Significant Figures Made Easy!

Published on April 28, 2008 by

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Don't be confused by Significant Figures! It will JUST MAKE SENSE with this video! An introduction to significant figures. Discusses how to round for multiplication and division using significant digits.

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  • devilskullsixtysix 14 years ago

    Dude you made this really simple thank you very much! 😀

  • DryWhater 14 years ago

    thnx 4 the help

  • Charlie Mätur 14 years ago

    thanx man that really help your awesome for putting a video about this thats why i love you tube everything is in here thanx

  • reslus 14 years ago

    Wonderful service you did for students. Much love!

  • Tyler DeWitt 14 years ago

    i understand your question, but 1,600 only has two significant figures, so you don’t have to worry. zeroes at the end of a number without any decimal places (like the two zeros in 1,600) don’t count as significant figures. you correctly said that the answer could be reported as 1.6 x 10^3, and that’s just a different way of writing 1,600. you should watch my video about zeros if you’re confused about which zeroes are significant and which aren’t.

  • electoman99 13 years ago

    How would you turn 895.23 into 2 significant figures?

  • Tyler DeWitt 13 years ago

    that is a very picky way of doing significant figures, and–honestly–pretty much no one does it that way. in these videos, i say round up if you have a 5, so 3.385 always becomes 3.39. that’s what like 99% of people do. i’m sorry if your teacher wants you to do it the complicated way!

  • Tyler DeWitt 13 years ago

    it’s always the lowest number. so there’s 3 sig figs in 231, and 2 sig figs in 24, right? so you’ll round your answer to 2 sig figs. when i divide 231 by 24, i get 9.625, so i’ll round that to 2 sig figs, and it will be 9.6

    make sense?

  • Tyler DeWitt 13 years ago

    i do the same number of digits first because it’s easier. if you have questions about multiple digits, watch the next video, significant figures 1.2

  • Tyler DeWitt 13 years ago

    thank YOU so much! i love to hear that my videos are helpful. good luck in chemistry!

  • Sidney Hui 13 years ago

    my chem teacher is so bad at teaching.

  • soccerkjr 13 years ago

    Thanks alot dude. Helped ALOT!! i had no idea what was going on in chem class but know that’s changed!

  • Billy Jimibob 13 years ago

    nice of you to try to help people with this

  • X J 13 years ago

    5:09 hahaha multiplecation.

  • Angelini Antanorri 13 years ago

    omg thank you soooo much ^_^ very helpful!

  • Tyler DeWitt 13 years ago

    she said that because she’s super picky. the idea is that 5 is right in the middle so if you round the number so it’s even, sometimes you’ll go up and sometimes you’ll keep it the same. statistically-speaking, it doesn’t make sense and it’s not really a sound argument, but if it keeps your teacher happy, you should probably do it.

  • mrSilkie 13 years ago

    Thank you very very much, the teacher didn’t have alot of time left to fully got through this with us 🙂

    however, what happens if you have

    NNN.NN X NN.N?

  • mrSilkie 13 years ago

    okl, just got to the end of the vid 😛

  • Tyler DeWitt 13 years ago

    yes, that’s right, because there’s only ONE significant figure in 6, so the answer should only have one as well. you could write it as “40”, or if you want to use scientific notation, you can also write it as 4 x 10^1.

  • Andy Veh 12 years ago

    If you have an area that looks roughly like a square and the sides measure roughly 6 ft each, then yes, the answer is 40 sq.ft.
    However, notice the emphasis on “measurement” and “roughly”.
    If instead you measured the sides with a higher accuracy of 6 ft 0 in each, then the correct answer is 36 ft.
    If you didn’t measure at all and 6 times 6 are exact integers (as you’re doing a problem in math class), the correct answer is 36.

  • Kidrazor96 12 years ago

    This is pure genious, Best revision EVER

  • Kidrazor96 12 years ago

    @tdewitt451 What if it was something like:

    67 X 8 = ???
    There’s 2 digits on one side and only 1 digit on the other

  • TeamFurjan 12 years ago

    Ohhhhhhhhhhhhhhh. I get it finally. Lol. I have two bad teachers. Lol. Thanks Man. I finally got it. Lol and haha. 😀

  • tomandjerry600t 12 years ago

    how many significant figures is this? 40,000? 5? or 2?

  • Tyler DeWitt 12 years ago

    @swiitiichiil do you mean that 1.50 is what your calculator gives you, or 1.50 is what you want to round to? if it’s the calculator, it might have to do with what kind you’re using; i’m using a TI-83, which spits out many numbers after the decimal. if, on the other hand, 1.50 is the number you want as your final answer, that’s not right, because the zero at the end counts as a significant figure (watch my video on zeros), and you can’t have three significant figures in the final answer.

  • BengBengCat 12 years ago

    Thank you!

  • Kindara360Spades 12 years ago

    You saved me from Chem Honors my teacher can’t teach for crap. I wish you were my teacher rofl. Thanks!

  • Kelly LYons 12 years ago

    That’s a repeating decimal. Just saying

  • kiduel 12 years ago

    Great!!! it helped a lot,

  • David Zamarripa 12 years ago

    This helped a lot man, damn my chemistry teacher is soo damn horrible at his job, I don’t think anyone in the class even understand what the fuck he was talking about.

  • David Zamarripa 12 years ago

    Thank God for this video, I have a test on this tomorrow

  • josh3367 12 years ago

    @tdewitt451 i thought 6 and 6 were counting numbers and not meausrements therefore it has infanate sig figs and its 36

  • Tyler DeWitt 12 years ago

    @josh3367 good question. just because it’s 6 doesn’t mean it’s a “counting” number. if it’s 6 apples, then it’s a counting number (infinite sig figs). if it’s 6 feet, it’s a measurement with one sig fig. 6 people, counting; 6 pounds, measurement. make sense? here, i just want to show the basics, so i’m doing sig fig rules with all numbers–i’m essentially assuming that they’re all measurements.

  • Michael Y 12 years ago

    Hahahahaha i love u guy in the yellow thnxs so much!

  • Alvin Chen 12 years ago

    are the rules the same for adding and subtracting?

  • Tyler DeWitt 12 years ago

    @aznxboy1228 watching videos on significant figures on christmas eve? i’d think you were a pre-med at MIT.

  • Alvin Chen 12 years ago

    @tdewitt451 aw! why would you ever accuse me of being one?

  • AdorableNinja19 12 years ago

    thank you so much this video is a life saver my teacher cant teach for anything making this look so complicated then after watching this u make it look easy n i finaly get this thanks again ^w^

  • baggedyman 12 years ago

    I swear, this will f*ck me up in Calculus.

  • DJ S 12 years ago

    @swiitiichiil its the sme dont add zeros

  • Edgar Martinez 12 years ago

    thank you so much this is a perfect tutorial.

  • Arash Razi 12 years ago

    lol, if you are smart you figured it is easy,lol

  • Egzon Shabani 12 years ago

    7.09 how do u knw 1 and 5 is gonna stay :s his is what I need help :d

  • Reza Math Lessons 11 years ago

    why you chose all numbers that have the same number of you did all special cases.what if we divide 3 digit num by 2 digit num?

  • Krishan Dhokia 11 years ago

    Love you dude (no homo)

  • ROSIE DAY 11 years ago

    what about 45/456? is it to 2 or 3 sig fig?

  • Bunfire123 11 years ago

    lol very helpful

  • flashing511 11 years ago

    hi mate thanx for this useful piece of information , BUT I THINK there is sth wrong if u go through (56×28)again … , UR ANSWER was 1.600 which has 4 significant figs and u needed only 2 of them .. i do not know if i’m right but any ways watch from 5:15 thanx

  • Tyler DeWitt 11 years ago

    @flashing511 here are a few things that may help. 1,600 has only two significant figures (watch my “significant figures and zero” video for more info on that). but remember that i’m from the US, where 1,600 means one thousand six hundred. in much of the rest of the world, 1,600 means something a little less than 2: one and six tenths. in the US, we’d write that number as 1.600, and 1.600 would have four significant figures. does that make sense?

  • flashing511 11 years ago

    @tdewitt451 thanx yes ,,,it does . sorry for interrupting 🙂

  • Joy Bongzkytan 11 years ago

    god im really slow in significant figures

  • Tyler DeWitt 11 years ago

    @TFrench009 you’re doing a subtracting problem. you want to watch my video “addition and subtraction with significant figures.” that will tell you the answer you need.

  • Min ay 11 years ago

    Man…. chemistry is so hard my teacher is really bad at explaining things. but thats america for you

  • Mayra Vega 11 years ago

    omg I freaken love you..I now understand this because of you!!! THANK YOU SO MUCH!!!!!!!!!!!!!

  • Edward Nygma 11 years ago

    So…….. sig. fig. are used to keep teachers from being asked, “What value do we round to???”

  • BONELESS 11 years ago

    Dude thank you Sooo much !! U saved my ass !!!

  • Tyler DeWitt 11 years ago

    @bennemann you’re exactly right! the whole POINT of significant figures is to DECREASE the precision of your result, because it was too precise to begin. if both numbers you multiply together have two digits of precision, your final answer can’t have more than two digits of precision.

  • ddarakdjian 11 years ago

    @tdewitt451 how would you round off if the number is not exact, for instance converting Mount Everest to meters from feet to the correct number of SF
    29028ft = 8847.73m ?

  • pikaparty 11 years ago

    Oh, now I get it. :0

  • bigdog131000 11 years ago

    AAAAAh I have a TEST tomorrow.

  • Eliza M 11 years ago

    Thank you! I have a quiz on Monday about this.

  • Tyler DeWitt 11 years ago

    @TheIkitta if that already makes sense to you, go for it. i talk more about that approach in my video “scientific notation and significant zeros (1.8).”

  • Felix Law 11 years ago

    professor john mayer

  • Tyler DeWitt 11 years ago

    @aznxboy1228 no. watch my video “add and subtract with significant figures (1.6)”

  • TwilightFlip 11 years ago

    You taught me more in 7 minutes than my teacher could in a whole class.

  • Joel Lindholm 11 years ago

    @TheIkitta: Yes it’s right

  • Yenifer Cruz 11 years ago

    omg u should become a teacher this help me so much

  • jennanuntavijan 11 years ago

    Why did you add the zeros after the multiplication and not the division?

  • Josh C 11 years ago

    @hupper12345 2 — it’s always the lowest

  • That Man Melvin 11 years ago

    1600 is 4 s.f., since zeros only don’t count infront of the others, like 0.5 (1s.f.)
    1600 in 2s.f. should be 1.6×10^3, as Thelkitta said.

  • Ravel1299 11 years ago


  • budsandblossoms 11 years ago


  • Mustafa mohammad 11 years ago


  • Susanelena 11 years ago

    wow you made it so much simpler than my chem teacher :b thank you so much!!!!!

  • Tyler DeWitt 11 years ago

    @Allison0776 yes! watch my next video, significant figures 1.2. i have a whole series of sig fig videos, you can watch them in order and everything should make sense!

  • Tyler DeWitt 11 years ago

    @hupper12345 watch the next video, significant figures 1.2

  • Roberta Marques 11 years ago

    very helpful ! thank you.

  • M Abdullah 10 years ago

    but accoring to my book 3.385 will be round into 3.38 i.e if the digit is Even before 5 then that even number will remain unchange, i.e 3.38 And if the digit is odd before 5 then it will be round into its next even number.

  • thomas meccos 10 years ago

    Thank for the lesson

  • Lauren H. 10 years ago

    thanks this definitely helped

  • Ruthanna Hutton-Okpalaeke 10 years ago


  • Gob3l 10 years ago

    Thanks, that was very helpful! Although I have to ask, did you upload a second part to this?

  • Tyler DeWitt 10 years ago

    i’m glad it was helpful! i certainly do have a second part. it’s called significant figures made easy (1.2). i also have tons of other videos on significant figures: you can find them all by searching my youtube channel, tdewitt451

  • ETTeqnikz 10 years ago

    I’m learning this in maths, not chemistry or physics…

  • Maria Paula 10 years ago

    Very helpful and straight-forward approach. Can’t be explained any better!

  • Iheart Vulgarity 10 years ago

    Cute AND helpful.

  • Bini Shulman 10 years ago

    you are good at explaining things.

  • Tom Dytorn 10 years ago

    this is really helpful, right now i’m supposed to be in college but I can’t afford it, so I’m studying back to take a test so I can get into a University,

  • Pudding Brain 10 years ago

    THANK YOU VERY MUCH! It has took me weeks of confusion, everyone explained it too complicated. but you helped me so much! A weight of my mind for my exam tomorrow <3 Thanks again you beautiful man!

  • Major General N'golo Kante 10 years ago


  • rendon belizar 10 years ago

    Does zero (0) itself has significant figure ?

  • Joshua Chua 10 years ago

    thanks for this tutorial thank you so much! this helps me a lot =)

  • Jazmine Garcia 10 years ago

    Thank you mister! You made it easier. :))

  • Clops Deth 10 years ago

    A neat thing they tought us in school was, ‘1,2,3,4 were going to stay on the flore 5678 were elevate.’ ( means go up to but yeah)

  • omier2 10 years ago

    bro i fell asleep in physics. Thanks a lot!

  • Blue Gomme 10 years ago

    OMG i love u!

  • King of Eden 10 years ago

    And if the numbers have different amount of integers like 568364 divided by 436?

  • Tyler DeWitt 10 years ago

    then watch the next part of this video, significant figures made easy (1.2). and then from there, you can watch the videos on significant figures and zero (1.3, 1.4, and 1.5), and then adding and subtracting significant figures (1.6). good luck!

  • smg13guy 10 years ago


  • Dan Holly 10 years ago

    thanks you

  • sarah vo 10 years ago

    omg. thank you! so much. :)) <3

  • Ciarra W. 10 years ago

    We’re all here because our teachers’ suck

  • Kenneth Min 10 years ago


  • Mrittika Ghosh 10 years ago

    thank you 😀

  • TheEspada34 10 years ago

    thank you so much the way my teacher teaches has something to do with the atlantic and pacific oceans and its just like wtf are you teaching but now i feel like i can pass the test tomorrow and prove that she devil wrong THANK YOUUU!!!!!

  • Dhroov Patel 10 years ago

    i love it when you circle the answer

  • 92swid 10 years ago

    lesson starts at 1:19 skip to there

  • Jeffrey G 10 years ago

    Love you.

  • Geovanny A. 10 years ago

    we just have 3 weeks into school and my chemistry teacher makes this sound like is a different language but thanks to you now i get 🙂

  • phuly21 10 years ago

    My teacher should be fire

  • Sahand Dehghani 10 years ago

    God bless your soul

  • 0718Dragonlord 10 years ago

    thank you so much, my teacher actually showed this to me in class but the wifi made the video buffer and shit so i decide to use mine,now it is easier thanks to you 🙂
    good thing too, i have some of this in my chemistry test tommorow.

  • 0718Dragonlord 10 years ago

    not all of us, my teacher showed this to me. 😛

  • RainfulPhenix 10 years ago

    Everyone in my class understand this, yet no one understands the concept of decimal places, apart from me.
    I hate being the odd one.

  • luthfi elbaba 10 years ago

    you help me do my math work properly tkx!!!!!!

  • KevinMaster Flexington 10 years ago

    so what if you have to find the number of sig figs on scientific notation??

  • Tyler DeWitt 10 years ago

    then you should watch my video called “scientific notation and significant figures”

  • KevinMaster Flexington 10 years ago

    that was exactly what i was looking for!!! thanks!!

  • Liz Z 10 years ago

    i learned that for a number with 2 significant figures, eg ur example 56 x28 = 1,568.. then we should use scientific notation instead of just filling them in like zeros. such as 1.6 x 10^3 instead of 1600, is that correct? should we use scientific notation instead of just filling them in with zeros?

  • Tyler DeWitt 10 years ago

    that is a very good questions, but the answer is very complicated. i talk about this in my video called “scientific notation and significant zeros (1.8).”

  • kittywakes 10 years ago

    Thanks for sharing!

  • Shawn Wooton 10 years ago

    yes that is correct

  • Shawn Wooton 10 years ago

    my teacher was weird about the way he put it. it was confusing

  • SilverL3AF 10 years ago

    you draw really nice circles. =]

  • Tyler DeWitt 10 years ago

    yeah, i intentionally left that rule out because i hate it, and it’s mathematically incorrect. i know that some teachers like to use it, but it was designed for accounting (like rounding numbers in a bank account), NOT for scientific measurements. so if that rule is in your textbook, then maybe you should use it in class (ask your teacher), but i’m not trying to teach it here.

  • Luke McCall 10 years ago

    Thanks for the video! just saved me for my exam tomorrow! 😀

  • nfsking2000 10 years ago

    Thanks man

  • demon from hell 10 years ago

    If a teacher is looking at this, please know; If you’re failing your students, the. You fail as a teacher. Your job is to make your students successful

  • demon from hell 10 years ago


  • Mohammed Nasrallah 10 years ago

    youve actually made chem real interesting; thanks dude

  • Matt Logan 10 years ago

    Cheers man, this really helped me underdstand for my gcse maths in 3 days! You rock

  • tvbx520 10 years ago

    You teach me better than my chemistry teacher. She’s pathetic.

  • Aeryn 10 years ago

    Clearly. You mean “our teachers suck”.

  • LoserLemon 10 years ago

    OH MY GOD THANK YOU! my chemistry teacher is terrible! she literally doesnt teach anything, just gives us packets and tells us to read it…. and then she gives us a test and we all fail! this made sig figs look so easy! thank you!

  • iTsNoTM3 10 years ago

    Who knows Mr.Nelson?
    This video also helped a lot.

  • stargirlsusan 10 years ago

    Thanks, however, it turns out that that my instructor said that only those numbers that have been measured are the ones that one should consider when rounding up, which i find so confusing. The problem was to convert 1.2 weeks into seconds

  • Tyler DeWitt 10 years ago

    here are two videos that might be helpful for this: watch “why are significant figures important?” and then “significant figures with measurements and counting numbers.”

    • shivansh Jha 2 years ago

      Hey i am from India and you are just too good…i have no words to describe how blessed i am feeling right India students give respect to their teachers by touching their feet….and i just wanna touch your feet….please bless me SIR…
      Thank you

  • stargirlsusan 10 years ago

    OHH thanks man I get it now.
    thanks you for making the videos they are very helpful. hope I do well o my test on monday 🙂

  • C0C41nUm 10 years ago

    Im here cos i slept in class

  • nickpetten 10 years ago

    perfect now all i need to find is a video on how to study for a physics midterm the night before :-/

  • Rojin Rahmani 10 years ago

    thanks!!! you’re page is making me love Chem !!!!!!!

  • Zain Sarfraz 10 years ago

    Safe man easy work helped:-)

  • uvonpunkfarm1 10 years ago

    or because our teachers give us tests without teaching it

  • naruto-megafan 9 years ago

    omg need this for my maths exam tomorrow!! I didn’t know it was this easy 😀 When my teacher was explaining this i was wth O__O U DA MAN!!

  • Ashley Cadet 9 years ago

    Thanks you explain this so easy

  • Kemi Peters 9 years ago

    i guess were are guilty

  • Rajesh Sarvanathan 9 years ago

    What if you were multiplying 323 with 26. How many sig figs? You didn’t state that in your video Sir.

  • Nadine Villanueva 9 years ago

    What if you’re dividing two different significant digits on each side. For example, 767 divided by 47. How does that work?

  • Gash Bell 9 years ago

    super appreciate ur video!!BIG THUMB UP!!!

  • Patrick G. 9 years ago

    You are by far my favorite you-tuber, thank you very much good sir.

  • Stephen Rayner 9 years ago

    Isn’t it 1.50?

  • Matthew Camilleri 9 years ago

    Thanks for the tutorial… I was confusing sig. figures with decimal places. It really helped!

  • Claudia Pintos 9 years ago

    well you can find that rule in physics book for IB

  • Al Kan Not 9 years ago

    Ugh, I’m so confused..
    Especially now considering the fact that an IB physics book is saying the oposite of what Tyler’s saying… -_-

  • 0324stephanie 9 years ago

    You were excellent !!! I totally got it with your help!!! But where is the rest of the video I could have really used !!!

  • Renard The Fox 9 years ago

    I get it now, Thank you very much this will help in my quiz tomorrow 7/8/13 🙂

  • Shadow 9 years ago

    I need to round 53.97663855 to 3 sig figures.
    Is it 53.9 or is it 54?

  • Tibor989 9 years ago

    It’s 54.0

  • L_Hastings 9 years ago

    So what if you’re adding a two digit number with a three digit number?

  • Lovely Poloniati 9 years ago

    Really helped! Thanks 🙂

  • Jakely7 9 years ago

    Im 13. 🙂

  • GenieWeinerDog 9 years ago

    What if the divisor and the dividend have a different amount of digits (no zeros)?

  • Louise Super 9 years ago

    You’re just teaching how to base and to round off..

  • Josh From The Valley 9 years ago

    Lmao, I learned faster with this video then I did in class… sheshh.

  • Arielle Shaw 9 years ago

    then you pick the number with the least significant figures and thats the amount of digits you round to

  • Karmen Magel 9 years ago

    What if you have 763/56? There are 5 significant numbers here in all. What do you do?

  • Missy Islandis 9 years ago

    Since 56 has 2 significant numbers, you gotta round the final answer to 2 digits. The rule in multiplication or division in significant figures is you gotta round the final answer to least number of significant numbers in the question.

  • Nick Hubbard 9 years ago

    this is a beautiful comment.

  • Chief PKelley 9 years ago

    For chemistry we have to round 3 sig figs to 1, how do i get 1 sig fig?

  • Sheerica Ware 9 years ago

    Thankkk youuuuuuuuuu! I’m taking AP Chem this year and this is like a life savor..Because I’m like…WHAT and WHY?!

  • Joey Tran 9 years ago

    Chord overstreet smart twins… Hehe

  • Make Marshall 9 years ago

    Thank you sooooo much!

  • Khanh Nguyen 9 years ago

    Thank you very much !!!

  • Tom Villarreal 9 years ago

    I’m taking pap chemestry and I needed help

  • damon hamacha 9 years ago

    Enough with you and saying thats a really ulgy number seriously

  • Ghost666 9 years ago

    why the hell did the video end that last part I don’t know

  • Braden8558 9 years ago

    Thanks very much for this great video series! You should be a school teacher! I watched a lot of the following ones to understand my homework that he didn’t seem to talk much about. Thanks again 😀

  • Explosive Laughter 9 years ago

    7:06 Lets take a look…..end No! No! Come back!!

  • Blake Crosby 9 years ago

    I think I’ve learned more in two of his videos than I have all year in class

  • MrIkillgamers 9 years ago

    i am doing dimensional analysis but like my teacher wants the answer in to significant figures an i am confuse!!!

  • billie hart 9 years ago

    i love your hair

  • Miss Mandii 9 years ago

    I am doing a tertiary access course @ James Cook Uni in Australia and you sir have just helped me immensly!
    Thank you!
    Really well spoken, easy to understand and just well done.

  • Adam Baig 9 years ago

    How would u work out one sig fig

  • Kizay 9 years ago

    Thanks you helped alot with my chemistry honors class. 🙂 subscribed

  • lindsay 9 years ago


  • Chuck Simpson 9 years ago

    part 2?

  • samashi322 9 years ago

    There’s a second video.

  • lovero2777 9 years ago

    yo i dont really get it but thats why base god fucked yo bitch

  • twolate2l00k 9 years ago

    to make you watch part 1.2 duhhh

  • OfficialDanceMusicTV 9 years ago

    you’re an awesome teacher

  • Jackson McKenzie 9 years ago

    What would happen if you had 0 + 9,384,192 
    Ok, so you can only have 0 significant digits…
    So you write the number as…

  • CrushOfSiel 9 years ago

    He does do a good job teaching on this subject. There is however an easier way to remember all of this. Google the “Atlantic Pacific rule for significant figures.” It stayed with me for like 12 years. I just came here to see if my University’s book had an error, it did :s one of the given variables was 70kg and the answer the book gives is 9.0cm… Honestly though check that rule out, it’s easy to remember and you’ll never forget it. 

  • Dee Everitt 9 years ago

    I have learned all things sig figs from you.  What I don’t understand is my chem book asks how many sig figs in 250mg?  The book say’s, “3 the trailing zero is significant.” That doesn’t make sense to me.  I thought it would be 2 sig figs. The 2 and 5.  There is no decimal, so the zero to the right should be insignificant.  Right?

    • Tyler DeWitt 9 years ago

      You’re right! And the book’s wrong. Without that decimal point, you can’t know that the trailing zero is significant, and it’s correct to assume that it isn’t. Just FYI, if that zero were significant, one way (other than a decimal point) to show that it is significant would be to put the number into scientific notation: when you write 2.50 x 10^2 mg, that would show that the zero is significant, because then it’s to the right of a decimal place. Good question!

    • Dee Everitt 9 years ago

        I also went to chem tutor today, and they too said book was wrong.  I’ve yet to show instructor, but I will.  Keep up the good work.  Your explanations are stellar!  Now on to learning moles…

    • craig hay 8 years ago

      250mg is 0.250 of a gram and so that zero is significant. I think you’re thinking of it as a whole 250 instead of the decimal 0.250. Hope that helps

    • Dee Everitt 8 years ago

      @craig hay

  • Pure Playa 9 years ago

    lets say i have, 5.61 x 7.891 How would i know how much significant figures to round it to

    • Lyrics101 9 years ago

      My Chem teacher said that you always go with the number with the smallest amount of significant figures.
      5.61 = 3 Significant figures
      7.891 = 4 Significant figures
      So your final answer should have 3 significant figures.

    • Sir Gino Ferrer 8 years ago

      you’re right!!! my teacher too!!

  • two_three 9 years ago

    Thank YOU!

  • Tanae Bailey 9 years ago

    LOL 3.58JNIkdhuani

  • up97 9 years ago


  • dwizzlejerk 9 years ago

    Impressive circling. Whenever I circle my answers the ends never come together that neat.

  • Lara 9 years ago

    So agree with the title! It did make it so easy!! 

  • Justin Maloney 9 years ago

    what happens if you have one figure that gives you 2 sigfigs and the other side give you 5 sigfigs… how many numbers do we round now?  2 or 5? 

    • JRLM 8 years ago

      @The Saracen I figured that, thanks. 

  • Carol Pingel 9 years ago

    Ok…he *might* be stoned in this one, but still…great help!

  • Julie Gal 9 years ago

    I love you

  • Marisabel Acevedo 8 years ago

    Thank you so much. You have saved me about 20pts on my quiz and much more in the future.

  • Unathi Meleni 8 years ago

    Thank you so much.

  • jim g 8 years ago

    nice, thank you!!!

  • Mahmoud Al-Ruweidi 8 years ago

    This video before you become an awesome public speaker 😛

  • Abimbola Salokun 8 years ago

    Thanks a lot! I m real good at it now!

  • Tom Smart 8 years ago

    what if one number has 2 significant figure and the other has 3 do u round it to 2 or 3 significant figures

  • Spiky Lee 8 years ago

    woah,just noticed,tyler DEWITT,you know?from bioshock infinite?(please dont be  reading comments and get distracted by this,continue studying -.-)

  • gothicfury 8 years ago


  • Alliyah Meadows 8 years ago

    Makes it look so easy :/

  • SARILARIN SÜLEYMAN 8 years ago

    This video before you become an awesome public speaker :P

  • Kevin Mizrahi 8 years ago

    I thought when there is a five in next to the number your rounding it makes the number even so wouldn’t it just stay as 3.38?

  • Ram neutron 8 years ago

    thank u so much its help me alot bcoz no one teach me in my classmate 

  • eksoodohs 8 years ago

    Thank you very much for this but . . Seriously you’re wasting papersssss . . I suggest you do this on a white board . .

  • Rachael Collins 8 years ago

    I am really learning a lot from your videos and think that you are a great teacher but I don’t like that you say “If your smart you probably already know…….” Although I do totally understand sig figs, I’m one of the ones that loves sig figs, it just makes my heart sad that maybe someone doesn’t get it and now they may feel worse about themselves because it should be easy and they still aren’t getting it.

    • S-kun ! 4 years ago

      It’s not that deep

    • My autism is exacerbated saying this, but 4 years ago


    • Cront Squared 3 years ago

      S-kun ! srsly

    • Saja Kamal 3 years ago


  • D. Lisa del Rosario 8 years ago

    Thank you so much for sharing your knowledge and know how. This proved to be a great homeschool tool for me – and my teenaged daughter.

  • 13CrazyDaisies 8 years ago

    Hm. I’m pretty sure this guy looks like a mix between Samwise Gamgee from “The Lord of the Rings” movies and Riley Poole from “National Treasure”…

  • eleanor calder 8 years ago

    do you have to round it all the time?

    • Darwin Smith 8 years ago

      The answer to this would actually be 11.3. The rules for addition/subtraction differ slightly from multiplication/division. The answer should be as precise as the least precise number used in the calculation. 10.120 is precise to the thousandths place; 1.2 is precise to the tenths place, which is less precise. So the answer should be precise to the tenths place: 11.3

  • Czarina Jireh 8 years ago


  • thescarletpirate 8 years ago

    You are amazing!

  • Nora a 8 years ago


  • streezus 8 years ago

    Dude made two perfect circles in a row wtf

    • Patriot9827 4 years ago


    • Als 4 years ago


  • Chad Matthus 8 years ago

    Thank you so much! This helped a lot!

  • Matt H 8 years ago

    I stopped at the 2 minute mark, needless to say I bombed my quiz

    • Utony Nguyen 8 years ago

      Oh, Stalin, thankfully you didn’t bomb anything else ^^

  • Divya 8 years ago

    this makes so much sense now!

  • Shannon Westfall 8 years ago

    Okay I’m having some problems with this, I understand the explanation you gave. But the program I am dealing with is  problems like this: 30.053/60.33
    I understand how you get the significant figures, but what I don’t understand is putting the final answer in scientific notation with the correct significant figures.

  • chad phillips 8 years ago

    in the second example why didn’t he round the 3 up to 4

    • Amr Arafa 8 years ago

      because you should write down the ans. with digits as the least no. in the division ( here 782/231) both having 3 sig. fig .. so the ans should having 3 sig. fig.( 3.39 ) but if u rounded it into 3.4 this is not accurate as u made ans. only 2 sig fig instead of 3 .. hope u got it :))

  • Olin Ace 8 years ago

    Yes! Tnx so much

  • Taren 8 years ago

    I love you. Thank you.

  • Shwetank Nath 8 years ago

    LOOL hes like ” if your smart … ” then he paused ” nah who am I kidding you ain’t smart”.

  • Asiimwe N. 8 years ago

    what if the two numbers u are dividing do not have the same number of significant figures? ex. 678/23?

    • Swagiller Bee 8 years ago

      @Tyler DeWitt thanks a lot man. My AP Chem. teacher in high school made this harder than I thought it was. She was a really horrible chem teacher.

    • sebastian cuello 7 years ago

      @Asiimwe N. 29

    • Yo It's Jerry 4 years ago

      What if it’s 0.8×0.8, does the 0 count as a significant figure?

    • sbvr 4 years ago

      The one with less sig fig. So ur gonna keep two

    • Wolfster Ro3 3 years ago

      No the 0 doesn’t count because it is a leading zero

  • Nicole Le 8 years ago

    God bless you. This helped so much.

  • Raven Lelouch 8 years ago

    You are my saviour! XD

  • jorge gonzalez 8 years ago

    on  4:11 why gte the 8 to 9 i though if the number to the right was smaller u didnt do anything but if it was bigger u increased it but 5 is less than 8 

    • ntcn0ah06 8 years ago

      If the number to the right is 5 or higher you round up and if its lower than 5 you round down. Hope I helped!

    • jorge gonzalez 8 years ago

      oh k ty man

    • PK764 7 years ago

      @jorge gonzalez u r right……………..its a rule if number to the left of 5 is even we keep it same n if its odd we increase by 1.

  • Pranav Nair 8 years ago

    My teacher can’t teach so i had to come here.

    • Amanda E. 3 years ago


    • Kai Patel Year 9 3 years ago


    • Joseph Johnson 2 years ago

      Chemistry is hard! Have you really tried as hard as you could to understand it? I’m a pretty successful HS Chem. tchr and my experience tells me that a lot of students don’t understand it because they try quite hard enough. Glad to see that you are here though. Good Luck!

    • Keira_bonks 2 years ago

      Pranav Nair nice pfp

    • Eva Woods 2 years ago

      that’s why i’m here <3

  • Peter Gagnon 8 years ago


  • Lucky Talisman 8 years ago

    240p, we meet again.

  • Kiran Punjani 8 years ago

    You made Chemistry easy. Thank you

  • Olivia Montoya 8 years ago

    okay what if its just a given number like 0.00012?
    or what about 1000? 10.023? What about 3000? Helppppp!!!!

  • abhinav chandra 8 years ago

    if 0 exists before decimal point then for 0.3521 its got five right then why did he round the no. upto .3521

  • Dhruv Sharma 8 years ago

    Helllo Buddy….i wanna ask why is butane is used in lpg cylinders,when we have Methane??????

  • Stephen Mealing 8 years ago

    Big help thanks

  • Chase Carter 8 years ago

    These videos really help and I appreciate them a lot

  • Cody Baker 8 years ago

    Thanks Tyler, Jesus really appreciates all of your help.

  • EmanuelOno 8 years ago

    Thank you ! i have a chemistry  final tomorrow and the only thing im stuck Sig Figs

    • Emmanuel Kelly 7 years ago

      Sent oun your behalf

  • Natural Prep 8 years ago

    Amazing videos. Eloquent, Articulate, and Effective.

  • OfDaSouth 8 years ago

    Wow this video is OLD!

    • Michelle Buswell 3 years ago

      @Michelle yes…I agree….they did not….but this video looks like it is coming through a tv made back then.

    • Brianna Hoff 3 years ago

      Wow this comment is OLD!

    • natalie chaeyoung 3 years ago

      Brianna Hoff lmao

    • Rudy Gillespie 2 years ago

      Damn 💀

    • Jass 2 years ago

      JOON’S MOON and ur comment too

  • dracophyle 8 years ago

    As soon as an instructor says the words “if you’re smart…” I immediately discredit everything they say before and after that statement. There is no need to be pompous just because you know a little something that others don’t. Most especially when those “non-smart people” are looking to you for help.

    • Davis John 5 years ago


    • Scott S. 5 years ago

      dracophyle lol get rekt

    • 93 3882 4 years ago

      dracophyle shut up dracophyle you butt hurt Mong.

      Go to confession you need it badly

    • violet sunshine 4 years ago

      This is nthg dude my professor said things that would make us not ask doubts when we were young

    • John Doe 4 years ago

      Cut him a break Draco.

  • Morgan Thatcher 8 years ago

    Great video Tyler DeWitt, thanks this really helped me review for my chemistry final.

  • Jaquan Webb 8 years ago

    What if you divide 789/65 ? Answer is 12.13846154. How do you know which numbers to keep if they are not the same amount of digits?

    • Enzo Cassino 8 years ago

      Then you keep the smallest amount of sigfigs that they give you, in your example 65 has the least amount of sigfigs. Therefore your answer will be 12. with 2 sigfigs.

    • Jaquan Webb 8 years ago

      thanks man !

  • Sanjit :) 8 years ago

    this is better than my maths class

  • Angelina Anderson 7 years ago

    love your channel , thank you so much!!!

  • Als 7 years ago

    Tyler you are awesome. thanks. this helped me in my college chem class.

  • ArmedPenguins 7 years ago

    Like if you’re watching in 2015!

  • Chito surumi 7 years ago

    For my chem test, I got every calculation right but I still got a 61% because I didn’t round the numbers properly

    • Jeffery_Stoner 7 years ago

      @Chito surumi I know that feel.

    • Kevin Huynh 7 years ago

      +Chito surumi I feel you mate…

    • No. 7 years ago

      Imao thats cruel ….. in my school the minimum to pass a test is 50% …. your score would be considerd great if you were here

    • Laverne Warrican 4 years ago

      In my school 60% is the pass mark

    • Marisol Torres 3 years ago

      Chito surumi that’s why I’m here too. I just don’t get it!!! I doubt my rounding.

  • Goku 7 years ago

    say if your answer is like 4.70459
    and you want 5 significant figures.

    • Hunter Cushman 7 years ago

      @Gokubleach09 The answer would then be 4.7046 since you want 5 significant figures

  • Tittletotute 7 years ago

    Can you use ugly answers if you drink a lot beforehand?

  • Andrea Kelliher 7 years ago

    Thanks a lot!!!!!!!

  • Gary Verderamo 7 years ago

    OK. This WAS GREAT!  I can’t thank you enough. My sister-in-law comes up to me and asks me for help with chemistry. I cringed because it’s certainly not my strongest subject. She hands me her notebook and I had no idea what I was looking at. I did a Bing search and found this video and we both understand significant numbers after having watched this series.  So, again. Tyler. THANKS!!!

  • Dano Vido 7 years ago

    Very nice! Thank you : )

  • noniabizz337 7 years ago

    you cant leave me wondering what happens if the the numbers of the equations don’t have the same number of digits.

  • Lauren D. 7 years ago

    Finally someone actually explained it in simple terms!! Thank you!!!!!

  • Mojo Jojo 7 years ago

    Godbless, I believe this saved my honors chemistry grade

  • Moses Roman 7 years ago

    but what about decimals and different amounts like 561/1.9

  • Yadley Joseph 7 years ago

    Yéé😀 now I understand thnx✌️ u make it easier for me

  • jjzombienomnom 7 years ago

    I needed chemistry teacher was coming up with the most complicated explanations for something that seems pretty simple.

  • Michelle Mosley 7 years ago

    I’m so glad to have found your videos. I understand a whole lot better and feel more confident after each lesson. you have a gift of teaching.

  • Waz Good 7 years ago

    My chem teacher brought me here, I have to watch all 10 videos lol

    • Newbport 7 years ago

      +Unlockerlocker Unlockme? Nice screen name.

  • Cinnie Jennings 7 years ago

    My teacher really couldn’t teach, his favorite to phrases in class were “it’s fairly self explanatory” and “don’t ask questions”, he also didn’t want to teach the way the book taught, because he’d learned it differently (40+ years ago) and he’d always get his math wrong.

  • Brintha Y 7 years ago

    Ur such an inspiration for people like me. When I am older I would love to do videos like u!! I congratulate u on ur success so far!

  • anthony cabrera 7 years ago

    This guy is Luke skywalker

  • Benicat Benoit 7 years ago

    Thank you !!!!!!! You are my hero . I am having a test on Monday and I had no idea how to do this.

  • saleh al-humaid 7 years ago

    7 years ago

    • Amanda Liu 7 years ago

      8 now lol

    • Alexandra G. Edgar 6 years ago

      OMG SUGA!!

    • [I]ntriguing-GaminG 5 years ago

      saleh al-humaid 9

    • zz . 5 years ago

      saleh al-humaid almost 10 now

  • Crystal V 7 years ago

    Tyler, you rock! You’re gonna get me through this class!!

  • Ando Rexurix 7 years ago

    Honestly, I see significant digits as a major waste of precious time and accuracy. But, school system demands I know it, so here I am.

    • YaGurl Stephanie 5 years ago

      Tap Tap Adventure are they in any exams?

    • Michaela Noelle Simpson 5 years ago

      true lmao

    • Jeffrey Black 4 years ago

      If you think that you don’t understand what accuracy is.

    • risenSHADOW17 4 years ago

      it is not a waste of accuracy, sig figs show how accurate you can get with given numbers (usually measurements). The “accuracy” you are losing out on is not even real accuracy because if you do not have the hardware to measure that small, you can not be sure that anything past the sig fig is truly accurate. Sig Figs ensure accuracy, they don’t take away accuracy, at least when it comes to actual applications of math

    • Jane Adelaide Lennox 3 years ago

      I actually think these are detrimental in fields like medicine… I can see why they’re a bit more important with less accurate instruments like a protractor or something. But in medicine, wouldn’t you want MORE accuracy if your equipment can handle it?

  • Elizabeth Adegbite 7 years ago

    Hi, please do you have a videos on PREFIX MULTIPLIERS ? Finding it very difficult especially converting to other mutipliers eg from meters to pico

  • Andrew Fox 7 years ago


  • Jazzy xox 7 years ago

    Thank you! this made the Matildas really understand significant figures!

  • Michal Prymak 7 years ago

    lol Tyler DeWitt in 2008

  • schoopi 7 years ago

    dude your a good teacher

  • Ryan Asahi Takanashi 7 years ago

    Some of these information is wrong. 5 is a tricky number when it comes to rounding. For example, if the preceding number is even then you would have to round down. However, if the preceding number is odd then you have to round up.

    • Tyler DeWitt 7 years ago

      There’s a lot of confusion about this. That rule with the even/odd rounding thing was designed for accounting, for rounding amounts of money. It’s actually called the “Banker’s Rule.” But we’re not doing accounting or money management here, so those rules are actually incorrect to use with science. Some teachers tell students to do the even/odd rounding thing, but they’re teaching it wrong. The Banker’s Rule should only be applied to accounting and money calculations, not to scientific measurements.

    • Chandler Devin 7 years ago

      Get rekt

    • Deborah Baltenberger 7 years ago

      +William Haydenman – the rule you mention is only applied if 5 is the last number in the raw answer. For example if you need 3 sig figs and the raw answer is 3.435 – the rounded answer would be 3.44. If the raw answer is 3.445 – the rounded answer would also be 3.44.
      This rule is used in science and engineering because it eliminates the possibility of multiplying error due to rounding.
      I provide my students with the following problem to prove what I’m saying.
      Add 0.5+1.5+2.5+3.5+4.5+5.5+6.5+7.5+8.5+9.5= 50
      Now round as they teach in the lower grades (5 or more rounds up)
      1+2+3+4+5+6+7+8+9 = 55 That’s a 10% error
      IF, however you use the rule you described, then only 1/2 of the numbers round up – the others “in essence” round down.
      0+2+2+4+4+6+6+8+8+10 = 50
      That’s right, the error disappears. In engineering when (for example – you’re building a bridge) you continually round everything with a 5 up… the bridge falls down (hypothetically).
      Of course any number where 5 is NOT the last number, you would use the rules you learned in elementary school BECAUSE, if you look past the 5 for any other number example 501 is more than 1/2 way to 1000. 54 is more than 1/2 to 100.
      I know that general rounding says to only look at one number to do rounding, but what is really meant is that you can’t round twice.
      24.549 (rounded to 3 sig figs can ONLY use the 4. I can’t use the 9 behind the 4 to round it to 5… and then use the 5 to round up.
      Hope this isn’t too convoluted to understand!

    • Emperor Earnest's Artexpressions 5 years ago

      I agree with the rule of 5 in rounding off numbers in terms of its preceeding number. That is what I am doing in my scientific computations. It has less error. But in fairness to Tyler DeWitt, your videos are awesome.

  • Lana Rey 7 years ago

    What do you do when they don’t have the same Number of sigfigs for example 61/432

  • Galileo Allonsy Gallifrey 7 years ago

    When is then answer rounded up?

  • Christopher Rapczynski 7 years ago

    Love how I got a 31% on my assignment despite understanding the lesson, then came here to find what I did wrong, but actually found that I already knew what I was doing. Great, I love school so much.

  • brad ledford 7 years ago

    Thanks you this video was well presented and easy to understand 🙂

  • naturalforme 7 years ago

    PLS PLS PLSSS do a lesson on wavelengths and Electron Configuration +Tyler DeWitt

  • Ayomide Johnson 7 years ago

    thank you so much!!

  • Kiran P 7 years ago

    Do you also know pre calculus? You’re an awesome chemistry teacher and I really understood it with your videos. I’ve actually been starting to pass my exams and I have recently got an A on my test after watching and learning from your channel. I really need help with pre calculus right now and was wondering if you do make videos on it.

  • Green Iris 7 years ago

    Mr. Tyler? Do you teach college students? Are you only teaching Chemistry?

  • BritishGuy 7 years ago

    So is 961 to one significant figure is 1000

    • sebastiian henao 7 years ago

      +Tea 4 life YES BRO

    • BritishGuy 7 years ago


  • Lorena De Belen 7 years ago

    how did the answer in 56×28 is 1,568 but why did you make it 1,600

    • Tanner Myers 7 years ago

      +Lorena De Belen There are only two significant digits in each factor so he rounded the second number in the answer up because the third number was a six

    • MsAwit 6 years ago

      +Tanner Myers but with the 8

    • Tanner Myers 6 years ago

      +MsAwit yes

    • MsAwit 6 years ago

      +Tanner Myers How

    • Tanner Myers 6 years ago

      +MsAwit sorry I misread your comment… No, not the 8… The 6 rounds the 5 up.. Disregard any other number

  • Lorena De Belen 7 years ago

    how bout the 8

  • Flowy's Creations 7 years ago

    The concept of significant figures in science is related to measured quantities, which should therefore have units. Without a unit, the meaning of the number gets lost. The unit is married to the measurement even though many students divorce them!! good videos despite the missing units!!

  • Doughrino 7 years ago

    i need part 2!!!!!!!!!!11

  • Maarij Atif 7 years ago

    can you please make a vedio on organic chemistry

  • MrCms007 7 years ago

    i always thought significant figure was referring to women…
    now i know!

    • Eric Kuhn 7 years ago


    • MARY W 5 years ago

      lol… I always think of the movie “Hidden Figures”

    • amrita singh 5 years ago

      MrCms007 😂 😂 😂 😂

  • Joselene 7 years ago

    My Professor can’t teach so I came here

  • Mama Realtalk 7 years ago

    Dude is like the Bob Ross of Chemistry. God Bless you, Sir!!!

    • CharlyInCharge1 4 years ago


    • Anas F Imron 3 years ago


    • Meliodas 3 years ago

      Mama Realtalk lol fr

  • Fabiola Sanchez 7 years ago

    I just started physics this week and I’m learning this here. thank you so much. I feel like i will be the one that understands it the most in my class!!! plus last semester everyone who had physics mostly had F’s, and D’s because they were strugginv hopefully I do well! I’ll continue watching your videos to see if they continue to help. ps. im in 9th grade.

  • Akrapovix 7 years ago

    Your’re awesome man

  • Arthur Cummings 7 years ago

    This mans a fucking Genius

  • Newport1959 7 years ago


  • Kelly Moneymaker 6 years ago

    Wish I could give you more support. I should have given YOU the tuition money I gave the local university 🙂

  • Katarina Reid 6 years ago

    THANK YOU THANK YOU YOUR VIDEOS ARE MAKING ME PASS CHEMISTRY, keep at it your an amazing teacher

  • MsAwit 6 years ago

    To make it crystal clear my question is:why the other numbers became 0 or all become 0’s

  • K Sparrow-Brown 6 years ago

    To me that is hard

  • Kenan Whyle 6 years ago


  • taylornechole 6 years ago

    Wait i really needed to know that last part what do i do if the numbers doesn’t have the same number of sigfigs such as 123 and 12

  • Gary Hart 6 years ago

    Wow you look different from your newer videos

  • Yulisa Ortiz 6 years ago

    Be my teacher

  • SuperZvn 6 years ago

    what if they dont ask u for a specific sf , what should u use then???

    • Amy Le 6 years ago

      I think it’s a good idea to always use significant figures so that you get used to the rules and it becomes second nature (that’s how my teacher always taught)

    • SuperZvn 6 years ago

      yh ok, but what would you use if you havent instructed to do so?

  • SuperZvn 6 years ago

    what about SF in temperature???

  • Row Al 6 years ago


  • Jrob2219 6 years ago

    thank you so much for being so as easy to understand

  • DCON 6 years ago

    Exactly 8 years ago today

    • hafsa mohamud 4 years ago

      Exactly 10 years ago😂

  • Nikki Louise 6 years ago

    nice like this lesson

  • woody breezy 6 years ago

    Where is the other half

  • trop chaud thomas 6 years ago

    Thanks 😁

  • Shubham Concern 6 years ago

    Will there be upcoming videos on organic chemistry?

  • SirGemini98 6 years ago

    You clearly earned a sub good sir.

  • SKYSTER FC 6 years ago

    i dont get it what if it is 324×23??
    do we take 2 sig fig or 3 sig fig????

    • Chocolate & Twix Bar Now 6 years ago

      I was wondering the same thing. I think you use the lower amount of sig figs. My science textbook uses the lower significant figure, but I still don’t know.

    • eFootball Pes Fanatics 6 years ago

      they would mention what number to round of

  • julian wilson 6 years ago


    • Rawls 6 years ago

      2008 dumbass

  • GoldenPower HD 6 years ago

    in 1568 why make 16 with this 1600

  • Krishia Marie Agaloos 6 years ago

    what if 602 x 34? which sig figs should i follow?

  • AP biology course n 6 years ago


  • JGNTH Music 6 years ago

    tysm for brushing this topic so well … it has become more smoother +Tyler DeWitt

  • GoldenPower HD 6 years ago

    what if The Original Answer is 20 and the Formula is like this a=10,000÷500

  • GoldenPower HD 6 years ago

    and it needs to be 3

  • GoldenPower HD 6 years ago

    pls answer

  • PublicSpeaking202 6 years ago

    I actually watched the video you made “Why are Significant Figures Important” first and then came back to watch this video and it definitely helped out a lot .

  • BoilingHotCoffee 6 years ago

    Why the hell do we do this

  • Miguel Saldana 6 years ago

    I fucking hate chemistry

    • Bemused Canon 5 years ago

      Miguel Saldana I hate my science teacher she teaches us something and she goes way to fast and says you should of paid attention and I have a D in that class

    • Jon 5 years ago

      christian Guzman my chem teacher is like that and if u have questions she will go over it but with an attitude and it makes me not want to ask questions because she makes u feel dumb for not knowing how to do the work

    • Sybil Birling 5 years ago

      me too

    • JK 5 years ago


    • J Bear 5 years ago

      ive got a test tmw rip

  • Tobin Bybee 6 years ago

    Thank you for helping this 46 year old through Chemistry. I appreciate your interest from a teacher’s view and making it easy and more understandable.

  • spencer hamm 6 years ago

    this sucked

  • Brianna Byrd 6 years ago

    wonderful review! Ive been studying for my nursing entrance exam and i had forgotten all of this from high school really great videos

  • ingimar sveinsson 6 years ago

    What about 5321/51 (1 four digit number and 1 2 digit)

    • KindredGh0st 6 years ago

      You round to the LOWEST number.. in this case 2. Because 5421 / 51. the 51has 2 places.

      I hope this makes sense.

    • L 6 years ago

      +KindredGh0st but then how would you write it? 5300, with 2 “placeholder” zeroes or just 53?

  • BULLS ON THE RUN 6 years ago

    Hello Tyler great video,I am helping with niece with AP Chemistry and I am completely perplexed!! Can anyone please help?
    A(n)__________________ is any substance consisting of two or more atoms held together by a chemical bond, while a(n) are two or more atoms of differing types held together by chemical bond.

    • NuclearFaIIout 6 years ago

      Molecule and compound

    • BULLS ON THE RUN 6 years ago

      Thanks again and keep the videos coming!!!

  • Shivani sinha 6 years ago

    happy teacher day sir.. u are the best teacher i ever got..

  • FoxyMoron 6 years ago

    I really don’t like this. But I am forced to learn it.

    • Super Super Hero 6 years ago

      @Hankdatank12345 Sorry, but where I am, Chemistry is needed to pass high school, so sorry for choosing to get an education

    • Hankdatank12345 6 years ago

      You do not need to apologize for making a good choice.

    • 67 SS 6 years ago

      Like he said, learn the basics and with a bit of practice this is second nature.

    • Backup Account 4 years ago

      Hankdatank12345 this is basic stuff that you have to learn during compulsory education. Most people don’t have a say in whether they’re in education at that age or not.

    • SMILEY MISSILE 3 years ago

      It look pretty easy

  • David Cope 6 years ago

    is he wearing a wig

  • CodytheAwe5ome Iz Awe5ome 6 years ago

    Thanks so much!!

    • Satya Swarup 5 years ago

      CodytheAwe5ome Iz Awe5ome

  • Ahmed The kid 6 years ago


  • Narmene Ben 6 years ago

    Thank you so much ! this really helped, i have a chemistry quiz tomorrow and I can’t understand sigfigs, now i have some information and I’ll be looking at the second video for the information about ZEROS. but thank you !!

  • Fatema Akbari 6 years ago

    That’s how I precisely feel lol

    • Aaron Cook 6 years ago

      Hey buddy

  • STAR ALLIANCE FLYER 6 years ago

    come on university is not simply…….

  • Aidan Murphy-Davis 6 years ago

    So crap I got 0 on my maths homework because of this guy

  • Logan X 6 years ago

    This helped so much! Thank you!!!

  • xdd 6 years ago

    Good review for chem honors thank you~

  • Argonaut 6 years ago

    I honestly am thankful for this video but once I’m out of college and pursuing my interests, I will have no recollection of this video. But for the time being, thank you.

  • Peyton Senyurt 6 years ago

    bowl cut

  • Martin Perez 6 years ago

    God bless you Tyler 🙏🏿 #blessed

    • Patriot9827 4 years ago

      #blessed YA BOIIIIIIIIIIIIIIII!!!!!!

  • Travine Allen 6 years ago

    My teacher made this look hard but its easy thx solo much Mr. DeWitt

  • Rafi Czegledi 6 years ago

    what if there aren’t the same amount of SF in both the things dividing ??

  • Keeley Bombard 6 years ago

    I just wanna say I no longer have a D in chemistry BC of these videos !!!!! TYSM

  • KiritoTheSlayer 6 years ago

    very helpful, thank you

  • Taraneh Javanshir 6 years ago

    Thank you, that was really useful…

  • Weibin Kong 6 years ago

    You explained like what a old man would do -_-

  • Tashe Dallas 6 years ago

    Who else is here because their mom told them to do something constructive with the internet instead of going on fb and talking to your friends on wattsap?

  • Leaa Malonie 6 years ago

    I love you so much for this😭God you’ve made my life so much easier

  • It'sYaBotBoi 6 years ago

    Thanks bro you saved my life lol

  • Sakura Keroine 6 years ago

    i find significant figures kinda confusing. it seems similar to decimal place but apparently im told that theyre not the same. i researched and read this website i found and i swear it made me even more confused, but this helped a little.

  • Pizza Rolls 6 years ago

    Mr Bailey,

    I am only 12 and you expect me to find a video on the internet explaining this in a way I can understand? You’re crazy sir. Why can you not just make us do some work in class about it? After all, we have no idea what any of this stuff even means. Why not explain it in class and *then* make us do homework on it?

  • cherry doll 6 years ago

    thank you.. I have a test next week..

  • NamelessDragonHTT 6 years ago

    I had a test after this so,I’m happy i watched this

    • Dia 6 years ago

      And here I had a test before watching this video. I’m so sad I watched this after my exam >.<

  • Pranks Lyrics 6 years ago

    I really enjoy your teach, the last year I was exchange student and you teach me very well thanks 🙏🏻 for teaching me, and for you it’s that I pass my final exams ☺️ thanks

  • Aaron Harvey 6 years ago

    00:01 dat moment when you rip bong and then remember you gotta do a chem video

  • Pete Newton 6 years ago

    wow! This is so much easier than my chemistry teacher made it sound.

  • Michellexbeauty 6 years ago

    I have an exam on this tomorrow morning yet here I am at 2:00 am, 4 hours before I have to wake up, getting my first REAL lesson on this because my teacher fucking sucks

  • tosasaurus 6 years ago

    the man

  • Aleksandr Hovhannisyan 6 years ago

    Question: 56 • 28 is in fact 1568. If we use significant figures and round this answer to 1600, aren’t we _losing_ precision? I thought the whole point of significant figures was to ensure precision.

    • Panagiotis2123 6 years ago

      Maybe someone can explain it better but i will try. The answer would be 1568 if you were sure that these numbers (56,28) were “correct” What do i mean:

      Let’s say you have to weigh something and the number you get is for example 1.5 kg.

      1.5 kg is not the precise weight of the object. It could be 1.51 kg or even 1.5798981239821739973129 kg.

      1.5 kg is the best that the particular scale you are using could give you. The best approximation, not the true value.

      So if you cad to subtract the weight of another object whose weight is know with better precision, let’s say 1.211 it would be wrong to say that the net weight is 1.5 – 1.211 = 0.289

      Your answer is “too precise” for the data you have.

      It is like answering the question: “How tall are you?” “My height is 1.8123080432905702542304732 cm” , while using a simple ruler to make the measurement.

  • Camila Martinez Ceren 6 years ago

    I thought whole numbers had infinite amount of significant numbers? when is this true?

  • Sadia Tasneem Khan 6 years ago

    please please help me with SO2 ‘ a structure im jst hanged with this one please!!!!!

  • Vera Velichko 6 years ago

    Awesome, took my first math class with Sig Figs and now I am using it in Chemistry and this gave me a great refresher! You’re great 🙂

  • 67 SS 6 years ago

    That was very clear and concise, but when you said that zeros don’t count as signifcant figures ever may confuse some people as that would conflict with later lessons such as if a decimal place is expressed after those trailing zeros.

  • Miris 6 years ago

    What if you are multiplying with different amounts? Say, 242 x 30 so you have 3 digits multiplied by 2 digits. Then which amount do you refer to?

  • Omar Martinez 6 years ago

    Chemistry sucks, but you’re teaching is awesome! You made it easy for me, as 123. Thank you!

  • mobiusbloom 6 years ago

    youre the man dude!

  • Santosh Mukherjee 5 years ago

    u looked so youngggg

  • Amanda Alfaro 5 years ago

    I’m converting 20.1celcius to Fahrenheit. My teacher says I have to apply the rules to each step. But if I do that I come up with the wrong answer. Help!

  • soulsmusic15 5 years ago

    I fucking hate chemistry. Js

  • allen wong 5 years ago

    sam wise

  • Blessing Jombo 5 years ago

    First time in your site Mr T.D I think your method of teaching is beginning to change my hate for chemistry. You are awesome Thank you.

  • Ryan Dyjur 5 years ago

    still confused about log and 10^x sig figs.

  • natcy bella 5 years ago

    love your videos

  • Jill Brown 5 years ago

    what if both numbers had a different amount of sig figs? like 345/12

  • Brian Pedroso 5 years ago

    Does anyone know how to express 99.518 to 2 significant figures?

  • M. Panganiban 5 years ago

    Just wanted to say Thank You! for making chemistry fun and easy to understand. You are the best, Mr. Tyler! I wish there are more peeps like you who not only love their job but love to teach as well. You’re definitely THE best chem teacher! Wishing you love and success in all your endeavors  🙂 … from, Your #1 Fan!

  • Rachel Su 5 years ago

    wouldn’t 3.385 round to 3.38 due to the 7 up rule?

  • Patrick Nolan 5 years ago

    uploaded on my bday 😊😊😊

  • Kadie-ann Johnson 5 years ago

    I learn sig.fig. in maths

  • ranjeet yadav 5 years ago

    i hope you were my teacger

  • ashutosh kumar thakur 5 years ago

    soory sir afterall i know that in significant no preceding digit is even then we don’t have to add 1 and you add 1…..

  • Chloe Mae 5 years ago

    Thank you for this ! I’ve even stuck on this for ages and I have my maths exam tomorrow !

  • Harish Pathak 5 years ago


  • PrimaVana 5 years ago

    Someone help me figure out why this problem is NOT 3.40 and it’s 3.39! Thanks

    • PrimaVana 5 years ago

      The problem is : 782 divided by 231

  • Reid Bradley 5 years ago

    my college professors weren’t as clear as this dude is. Bless you Tyler Bless you!!!!

  • Bryce Pickett 5 years ago

    I am in 7th grade in the middle of summer I like learning

  • Marionne Mc Crae 5 years ago

    still dont understand what you do there

  • Marionne Mc Crae 5 years ago

    i dont think signification figure digit are hard because it depend on the type of teacher cause my math teacher teach make me understand but how he explain im lost

  • Angelique . B 5 years ago

    my teacher can’t teach so I’ll be around here for good whiles👀

  • Raymond Conner 5 years ago

    No help

  • poorvi jain 5 years ago


  • Christian Derosier 5 years ago

    hello, Tyler I just watched your TED presentation and I completely agree with your approach. Making the beauty of science achievable and comprehendable by everyone no matter what more important in the long run. Great job!! keep going maybe the Big institutions will catch onto your genius insight.

  • ErBean The Panda 5 years ago

    Wait……….let me just do something

    *Clicked Subscribe*

  • Pj Butter 5 years ago

    You have taught me more than my professor. I’m so grateful fir your videos

  • Markos 5 years ago

    Tyler where did you go? you videos are so great!!!

  • Sri Giri 5 years ago

    I liked ur vsepr lecture…nice

  • Deepanshu Sunwal 5 years ago

    You devided the number with same number of digits what will happen if number of digits are different

  • Aditya Shah 5 years ago

    2017 here.

  • John kadhila 5 years ago

    this is not helping not at all

  • Alandra Zaia 5 years ago


  • Renu Kumar 5 years ago

    Can u plz give a full complete lecture on atomic structure…

  • Miguel Aceves 5 years ago

    pickle rickkkkkkkkkkkkk

  • Another View 5 years ago

    So simple! thanks

  • QUASI-HOBBESSIAN 5 years ago

    Thank you for this video people like me who aren’t good with numbers really appreciate it! 🙂

  • Chase Hornsby 5 years ago

    Why can’t teachers explain it this easily

  • Dave Mankoni 5 years ago

    This video and your others have helped my kid a great deal. You lay things out in order and make it make sense. Your efforts haven’t gone to waste. Thank you for your efforts. Kudos!

  • Nig Nog 5 years ago


  • Yash 5 years ago


  • TheOkwaCraft 5 years ago

    4:20 how come the 8 didn’t round the 3 up??

  • AngelFire550 5 years ago

    Am I the only one who didnt learn this in chemistry and is now in Physics struggling

  • Andrew Bibby 5 years ago

    Upvote because of Lord of the Rings

  • S-Tech 5 years ago

    make flashcards and test yourself for just 1 minute once a week and you will be better. don’t be lazy if you want to understand them

  • AQW Master 5 years ago

    what if the numbers have different amounts of digits

  • Tayyaba Rajgarah 5 years ago

    My teacher teaches well but I don’t understand her accent

  • flare3000 5 years ago

    Just saved me a lab that was due. Thanks, man!

  • Leah Smo 5 years ago

    “I would teach you sig figs before I gave you hw on them, but you’re an honors class. I’ve mentioned them a couple times without explaining them, so you can teach yourself” -my Chem teacher

  • Thomas Kruger 5 years ago

    Thank you for your help. This will get me a wayyyy higher score on my test.

  • dummyravenclaw 5 years ago

    i failed at my quizzes ’bout this topic so i have to learn this for my midterm exam which is tomorrow :/

  • Emily Hernandez 5 years ago

    Just found you! My professor is new and me and my class are guinea pigs. So grateful for you!!!!

  • Tech Box 5 years ago

    62/31 =2 lmao

  • Tea Sky 5 years ago

    Than you! You make these so easy to understand

  • My Support 5 years ago

    Which software you use for teaching ? It’s really nice .

  • Sara Sedillo 5 years ago

    Could you please make a video on Lewis structure??

  • Legal Latino Heat 5 years ago

    You are awesome. I don’t know why I’m graduating college anymore. If this video is worth more than a semester

  • Ethan Michael 5 years ago

    Good thing my teacher said that he was some real eye candy

  • M meow 5 years ago

    You sir are the bee’s knees

  • Alex C. 5 years ago

    Thank you so much for making it so easy to understand!

  • nobody rr 5 years ago

    nice video i now give value to significant numbers because my school concentrates on math alot so i need to use it at division

  • Lonely 5 years ago

    you are too smart

  • Real Chemistry 5 years ago

    Great explanation! Thanks Tyler!

  • Pizza 5 years ago

    My teacher gives me headaches! 😣

  • Awesome A 5 years ago

    your correct, an ugly answer

  • Hayden Christensen 5 years ago

    why chemistry? I’m learning this for maths lmao

  • Adam Murray 5 years ago

    Science, where a simple number like 245 can be 2.5*10^2. Which is simpler and more accurate with the least writing?

  • Noman Akbar 5 years ago


  • Shweta Lal 5 years ago

    what is radioactivity??
    plss tell

  • Wil Wong 5 years ago

    Love it

  • B1LLY_ B0BZ 5 years ago

    what about if the two numbers don’t have the same amount of significant figures for example 7782/513

  • Naruto Uchiha 5 years ago

    Why doesn’t the 8 round the 3 in the second example

  • chata lecheminant 5 years ago

    I got an F on my chemistry test because of significant figures. even though all of my answers were correct!

  • kaan güzsoy 5 years ago

    Sen kralsin reis
    You are the king of the chemistry

  • Poet 5 years ago

    Who’s watching I’m 2018…

  • Z 5 years ago

    2018 and teachers still don’t know how to teach…

  • HipisterPanda 5 years ago

    2018 bois?

    • Luke Waters 3 years ago


    • Queen Ai 3 years ago

      2019 😁

    • William Pak 3 years ago

      2019 actually

    • Timothy Chan 3 years ago

      2020 now guys

    • Math Legend 2 years ago

      2347? Anyone

  • Apollos Fn 5 years ago

    Look at this goof

  • Juice 5 years ago

    So this is what Luke Skywalker did after they blew up the deathstar. Pursued a career as a math teacher.

  • hobo 13 5 years ago

    in engineering we just use a precision value. For example, at the end of a question it will state “precision of 0.00” which seems much simpler for me.. however answers may vary more with this method

  • Lillyflower8 5 years ago

    10 years later and your still helping people! 🙂

  • manasi vale 5 years ago

    Sir. I have a question.
    Why carbon atoms do only covalent bonding in their compounds?

  • mikael t deleon 5 years ago

    I had to subscribe cus this boy right here will be my teacher for physical science

  • Sina Afg 5 years ago

    You are the reason why I always gets A+ for maths and chemistry. Legend and my hero

  • Sina Afg 5 years ago

    I would pay you a billion to be my teacher

  • Hannah J 5 years ago

    My professor can’t teach so what did I do? come here lol, ole reliable youtube

  • Sura Alsaeedi 5 years ago

    do not stop making a video for chemistry you the only teacher I understand you

  • asdfghjkl 5 years ago

    wouldn’t 56×28 = 1,568 end up being 1,6 x 10^2 instead of 1,600?

  • Xuxi Hasany 5 years ago

    9 years ago…lol. This video is pretty old. XD

  • Vince o brien 4 years ago

    Thank you for showing this, much appreciated

  • Samarth Joshi 4 years ago

    Your video is good but you should also give examples in which two significant figures divided by 4 significant figures

  • Gigi Hadidi 4 years ago

    This had been posted 10 years ago….

  • Grace Ruddell 4 years ago

    thank you!!!!

  • James Lourie 4 years ago

    Whos watching in 2018 lmao same school bs every year

  • Melissa Tarrant 4 years ago

    Woah it’s crazy how far your channel has come- watching a video from 9 years ago is crazy considering we have to watch your more recent videos for chemistry all the time. Kudos to you !

  • Shriraj Reddy 4 years ago

    this guy is a legend

  • isac0325 4 years ago

    What if it’s 142.997 /0.987

  • ALIYA Karibayeva 4 years ago

    great teacher!!

  • Rushelle Bernard 4 years ago

    Who is watching in 2018 ?

  • Aid Aish 4 years ago

    you should start a religion.

  • the curious owl 4 years ago

    So this is what you do when you solving the boyle’s law?

  • Hayley H 4 years ago

    This guy is the reason I’m passing chemistry so thank you.

  • LYF hAXx 4 years ago

    2018 anyone?

  • ANOTRI KUMAR 4 years ago

    Sir please can you explain about electron hole and can proton move?? I am confused

  • CANDER .FLOSS 4 years ago

    10 years and 2 days since uploded

  • Aaditya Informer 4 years ago

    who else is learning this in 2018

  • Wolf Fish 4 years ago

    🐥This is flappy and he can’t fly.
    Please help me to make him fly like others.
    One like= 1inch off the ground.🐥

  • James Hurt 4 years ago

    sig figs come from the accuracy from which they were measured. So if you had like 2 to 3 meters but you don’t know and you have to measure it with a meter stick that had no markings on it. So you measure two meters and the last part is shorter than your meter stick. You could guess so lets say it looks like 0.6 of a meter. your SIG FIG would be 2! NOT THE 0.6! You could accurately measure the two meters but not the 0.6. Now if you did this many times you could see where adding these things up could cause you to have way too much or not enough.

  • NO Logicz 4 years ago


  • RandyClassicCarsFan 4 years ago


  • Parul Aggarwal 4 years ago

    That’s d beauty of significant figures, they make ugly answers beautiful.
    Thank u Tyler dewitt 4 d video.

  • Shubhra Shandilya 4 years ago

    It’s quite baffling to know significant figures😶
    But, after watching your video atleast I could understand WHY IT’S NECESSARY…!
    Hey! It should be renamed as WHY SIGNIFICANT FIGURES ARE SIGNIFICANT – it will attract more viewers,trust me!!😉

  • Ch T 4 years ago

    Thanks for explanation

  • Reem Alm 4 years ago


  • Alyssa Mae Mayonado 4 years ago

    Thanks Tyler Dewitt

  • Zizet Ghobrial 4 years ago

    THANK YOU SO MUCH. I got an A in my chemistry class because of you. God bless you.

  • Jynx112 4 years ago

    10 Years later Im still doing this

  • Hahauravirgin 4 years ago

    Speed it up dude

  • Jevi Williams 4 years ago

    thanks know I will past my mathbtest

  • michelle 4 years ago

    can i have you as my chem teacher…

  • Aaron Ferguson 4 years ago

    10 years ago woah

  • Kael Sanity 4 years ago

    I’m a Senior High School Biology teacher but I’m given a Chemistry subject to teach, having a hard time at first but your videos really helped me a lot! Thanks!

  • Ranjana Kumari 4 years ago

    Who is watching this in 2018.

    • Areej 0o0o0o0o 4 years ago


  • Joshua Walker 4 years ago

    Oddly, you never explain the purpose of significant figures for never do you once reference the concept in relation to measurements. Not really criticizing though. I have learned so much from your videos over the years and would like to thank you more than anything else.

  • STREAM SWEET CHAOS 4 years ago

    wow, it’s already july of 2018 HAHAHAH

  • Kimber / Jinbo Datu 4 years ago

    Oh my gosh this vid was uploaded ten years ago

  • Akshay Tatikondalwar 4 years ago

    Significant figures don’t bother me as much as order of magnitude does
    I’m like wtf
    Why would you do that

  • Radical Barrel27 4 years ago


  • Cherry Kamino 4 years ago

    Watching in 2018. Damn.

  • GGG JJJ 4 years ago

    I still don’t understand this from sophomore year college freshman here

  • Su princípe 4 years ago

    What if there where 4 significant numbers to be devided into 3 significant numbers?

    • Explain It to Me 4 years ago

      Ryan Mark Madiwo Your final answer would contain 3 significant digits. It can’t be more certain than the least certain quantity.

  • Michelle Buswell 4 years ago


  • why bruh 4 years ago

    Rules to determine sig figs:
    1) All none-zero digits are significant
    2) Zeroes in between of Non-Zero digits are Significants
    3) Zeroes at the left of Non-Zero digits are not significant
    4) Zeroes that fall both at the end of non-zero digits and a decimal point are significant
    5) Zeroes that are found after a non-zero digit but contain no decimal point are not significant

  • Chu J 4 years ago

    2018 😀😀😀

  • shirine charkaoui 4 years ago

    How do u put it in scientific notation

  • Nurse Brooks 4 years ago

    Thank you for doing this. Watched all of your videos on sig figs and scientific notation. Really appreciate this. Thanks again!

  • MAS Chicken 4 years ago

    Thanks, Saved my packet for 9th grade

  • Poco Loco 4 years ago

    Make a video like this but with examples on numbers like 3427, ones that have decimal points, and acientific notation problems!!

  • AndresGK 4 years ago

    God bless you!

  • Crunchy B Roll 4 years ago

    omg thank you this is all clear to me now!

  • 2slow 4 years ago

    Thanks so much, 10 years later and you’re still helping teens learn

  • Prabhuraj Vanaki 4 years ago


  • Kaira Castro 4 years ago

    I’m watching because I have a test tmr😑….Wish me luck please

    EDIT: GUESS WHAT!!!! I PASSED MY FREAKING TEST …. Thank you so much for this helpful video 😊💜

    • Kaira Castro 4 years ago

      Patriot9827 Thanks bff💜💜😁😁

    • Mi Mundo Random 4 years ago

      Kaira Castro good luck

  • TEHNOOB916 4 years ago

    In science we want to be really accurate to the bone then comes along significant figures. Like WTF.

  • Zeek Star 4 years ago

    my god you are the best! taking Inorganic Chemistry rite now and your saving my life so far!

  • ittzz tslek 4 years ago

    وااااااااااااصل لبى قلبببببك

  • أ ر و ى الحـــربـــي 4 years ago

    10 years for help other 💗

  • قناة أولادنا التعليمية 4 years ago

    Wonderful! Thanks

  • Tom Schultz 4 years ago

    Hey Tyler!
    Thanks for the wonderful videos! I was hoping you might be able to update this video so that it is in HD. I use your videos as a supplement to my class for students who may need more review after class. One of the comments I get is that it is hard to view or “old”. I know the content doesn’t change and you do a great job with delivery – again, very appreciative of the video… just wondering if there is an updated version coming anytime soon. Thanks!

  • Ahmad Falah 4 years ago

    Mrs. Cillis

  • ElectricEel 4 years ago

    Wish me luck for my test tomorrow

  • Chris Wesley 4 years ago

    You keep using the word “number” when you should be saying “digit”. 64 is one number composed of two digits.

  • youlooksocool 4 years ago

    The reason why I am passing, god bless this man.

  • Ace Alexander 4 years ago

    They claim the purpose is to maintain the precision of the initial numbers, yet they’ll willingly cut a multiplication of two numbers to 1600.

  • Ziggyland 4 years ago

    Why does the 1 not make it round up/down and the 5 does? Can you explain that to me please.

  • Bella Rose 4 years ago

    WOOOAH this video is ancient!! hahaha

  • mil24 4 years ago

    where my 2018 gang at?

  • Dxrrelyn 4 years ago

    Just here because my teacher assigned my class to take notes lmao

  • K Pabbaraju 4 years ago

    The quality of the video bugs me. But what can I do? I really need to ace my Chemistry test tomorrow :’)))))

  • ArtByAmro 4 years ago

    writing from 2020

  • ArtByAmro 4 years ago

    any one from 2020

    • Connor Chester 3 years ago

      AY KBI just 2019 fam

  • Jagan Krishnasamy. 4 years ago

    Watching over 10 years since the video was posted

  • Noelle B 4 years ago

    PLEASE do organic chemistry videos

  • Lloyd Angelo Luna 4 years ago

    Taylor dewitt you look like Zach efron if its far

  • WildAnime 4 years ago


  • Jaden Johnson 4 years ago

    Thanks man this was really helpful!

  • Straight Arrow 4 years ago

    High School teachers, college teachers; they do not teach. They expect you to teach yourself. They are only there to give assignments and you have to go figure it out for yourself! I find Tyler DeWitt a great help. He is so much better than all the teachers I ever had in college.

  • Heather Gray 4 years ago

    I absolutely love your channel, just love it! Thanks so much!

  • Pranav 4 years ago

    I literally just saw a ad about

  • David Ajayi 4 years ago

    Who here is watching this before a test

  • StarFace 4 years ago

    Dude be lookin like Sean Astin and Jim Halpert’s love child.

  • MedEX 4 years ago

    Hi from Turkey in 2018 🙂

  • Baki Hanma 4 years ago

    O noooo I didn’t pick up on it guess on stupid RIP

  • TheEtbetween 4 years ago


  • Caroline 4 years ago

    I hate significant figures so so SO much but thank you for explaining it

  • Taylor hutton-potts 4 years ago

    Hi cicada!!! Enjoy your PSI seminars while you can.. it’s all going to come crashing down when QUINN finds his real family.

  • Sally Paulsen 4 years ago

    I have a test in an hour… wish me luck I guess, lol

  • Awwits mikey 4 years ago

    A life saver, now gotta learn 3 life subjects :/

  • Awwits mikey 4 years ago

    Who needs school, when YouTube has everything there. 🙂

  • o 4 years ago

    normally i meme coments but this video is so god damn good

  • Mohammad Chowdhury 4 years ago

    Why did you stop teaching in YouTube?

  • Noodles_V. 1 4 years ago

    That’s mean don’t call the numbers ugly

    • Noodles_V. 1 4 years ago

      Yeah he is mean

  • Huda Younus 4 years ago

    Can this be used for maths?

  • Kelvin Abragan 4 years ago

    the video was cut

  • burak erdem 4 years ago

    That is the very helpful video thank you so much sir !!

  • Kaitlyn Lee 4 years ago

    What if it is 4 significant figures divided by 2 significant figures?

  • Samal Sais Mohamed 4 years ago

    I was 4 when this was out

  • Ashwini Bagkar 4 years ago

    Hey bro thanks you cleared my doubt so i scored full in mathematics

  • Daniel Revollo 4 years ago

    thank you so much i was absent the day my teacher taught this lol now i have the hang of it

  • YouTube Account 0x0 4 years ago

    Was this made in the 1900s?

  • That's Not Me 4 years ago

    6:42 “If you’re smart” *Giant Pause*

  • shrek's jizz 4 years ago

    fred from scooby doo before the fame

  • GeloGaming T.V 4 years ago


  • brook yi 4 years ago

    this man is a god

  • Abdulrhman Benhassan 4 years ago

    thank you for this I understand so much not like my teacher

  • Erik Silva 4 years ago

    Thank you so much

  • MT AKDEMIR 4 years ago

    Thanks a lot

  • r5cpt 4 years ago

    The fatal flaw in your series about significant figures, is that you never even attempt to explain the meaning (and significance, pun intended) of significant figures. All of your videos on significant figures are, essentially, fundamentally useless and flawed, and only serve for rote learning but not for understanding.

  • M Chauhan Official 4 years ago

    Great Workkk..and From 2008..Im proud of you

  • Any Role? 4 years ago


  • Andrew macman 4 years ago

    Wow this was 11 years ago

  • noone important 4 years ago

    You are doing gods work

  • Tabby Forster 4 years ago

    i just hate chem 🙂

  • Andrew Kinne 4 years ago

    M8… this isn’t a speech, you don’t need a long intro (1:10 seconds), most people are in a rush to study or just want the video to cut to the chase.

  • Wovasteen Gova 4 years ago

    Bruh u have changed

  • all star_29 4 years ago

    Thank u sir my math teacher’s a bum

  • Hey Boo 4 years ago

    2019 peeps?

  • Nathan Skelton 4 years ago


  • Wadea Abdulhadi 4 years ago


  • Isaac George 4 years ago

    Where 2k19 at

  • Parker Walton 4 years ago

    2019 or nothing

  • Dumb TUBE 4 years ago

    2019 GUYS?

  • Richard Casillas 4 years ago

    Subscribe to T-Series

  • Elias Gutiérrez 4 years ago

    watching in 2019 this video is almost 11 years old

  • Nikki M 4 years ago

    U are amazing!!!!!

  • Ismael Hernandez 4 years ago

    What about numbers like 103, 10.3, and 1.03? Are there 2 significant numbers or 3?

  • SL 4 years ago

    Damn. This is dogshit

  • Kanivakil 4 years ago

    You keep having the same examples. For example, 4 digits multiplied by 4 digits and 4 digits divided by 4 digits. You need to provide different types of examples, not just multiplying and divide.

  • Ashlei Johnson 4 years ago

    I’m doing online chemistry. Sometimes reading from the book doesn’t help.

  • Crazy Point 4 years ago

    Still best chemistry teacher 2k19

  • hmm.08 akane 4 years ago

    ok so what about a number like 323 / 23 =? how many significant digits

  • Jester The Legend 4 years ago

    We on the real chem grind bois

  • PivotGuy401 4 years ago

    Top 10 cliffhangers

  • Yoshimation 4 years ago

    Day before a test squad wya

  • Gentle Wise Soldier 4 years ago

    Thx for teaching!!!

  • Adaxaan Abdullahi 4 years ago

    What a teacher !.thank you

  • prekshya mishra 4 years ago

    I have finals tomorrow

  • Poonam Singh 4 years ago

    what if on dividend is of 2 digit number and our divisor is of 1 digit number

    suppose , 21 / 3 then what should we do in that case.

    Please make a video of this also. please ……

  • aline antoine 4 years ago

    Hi Tyler my name is Aline I wanna thank you for your awesome videos, they’re very helpful. So I was wondering if you can help me with this problem I’m pretty sure it’s simple for you 😁 The “normal” lead content in human blood is about 0.40 part per million (that is, 0.40g of lead per million grams of blood). A value of 0.80 part per million(ppm) is considered to be dangerous. How many grams of lead are contained in 6.0 x 103g of blood (the amount in an average adult) if the lead content is 0.62 ppm. Thks for your help already.

  • rainboy1184 4 years ago

    Hello can you pls do a video of significant figures with multi calculations? With addition, subtraction, multiplication and division. I want to know what rule is followed for these calculations. Thank you very much..

  • premlata suman 4 years ago

    2019 ?

  • Jukkis O 4 years ago

    Hello from Finland. Thanks for the great videos, especially electrochemistry! I have resently taken those chemistry ones into my teaching curriculum. My pupils are capable of following english and I want to give them another, uncluttered view into the mater.

  • TeenTitans AMV 4 years ago

    Significant figures seems to be the only thing I’m struggling in on my chem quiz!😫

  • jaswant singh 4 years ago

    You teach very well sir.

  • Isaac Phillips 4 years ago

    Thank you.

  • Pari Pandya 4 years ago

    dang dont call the numbers ugly

  • ayobami tany 4 years ago

    lol love the show

  • Beautiful and Motivated 4 years ago

    @ 5:56 he gets 1600 as a final answer. But he needs TWO significant digits. I was taught that every number greater than one and on are the amount of significant digits you need in the final answer. So 1600 doesn’t make sense to me. He could’ve just kept it at 1568, because it has 4 digits no matter what.
    Am I missing something?

  • Iks 4 years ago


  • hugh Jassole 4 years ago

    Thanks napoleon

  • Declan Olivetti 3 years ago

    So it basically Decimal place?

  • VCN 3 years ago

    Who is here at 2019 and is not allowed to play fortnite

  • Jorge Luna 3 years ago

    6:42 what if ur not smart. Will u make a part 2 lol

  • Kevin Stewardson 3 years ago


  • One Punch Man 3 years ago

    thank you very much.

  • Umm e Ali 3 years ago

    2019 dudes hit like……

  • so so 3 years ago


  • Tdro 3 years ago

    Who here from 2019?? 11 years later lol

  • Ben Krauss 3 years ago

    Actually, it’s sig figs

  • Noelle Hirsch 3 years ago

    Thank youuu

  • Depressing Skyline 3 years ago

    Where have you gone???

  • jithamanyu br 3 years ago


  • smitha paulson 3 years ago

    Thank you Soo much

  • Grimwill Inc. 3 years ago

    2019 here guys?

  • Elkanah Rove 3 years ago

    2019 😋

  • royalrod _ 3 years ago

    What if it’s a 2 digit # divided by a 3 digit # ?

  • Dogistress 3 years ago

    Damn I was 3 years old when this came out and now I’m just seeing this in 2019! And I’m 14 years old.

  • lone2004 3 years ago

    Hey Tyler, great videos. I have 10 and 14 years old boys who are now addicted to your videos. You really make chemistry fun. Helped immensely to switch their addiction from fortnight. God bless.

  • Andrea Kelly Dela Cruz 3 years ago

    april fools 2019

  • Mirror View 3 years ago

    Anyone here in 2019 ??

  • Umar Shaikh 3 years ago

    4:11 that was so beautiful

  • Mellon Head 3 years ago


  • Mohamed Hashim 3 years ago

    what if you have one number with three significant digits and another with only 2

  • KaMiflexxYT 3 years ago


  • Titan Ian 3 years ago

    Who’s here in 2K19?

  • Sofia Leanne 3 years ago

    how did you grow looking younger

  • Kendrick White 3 years ago

    Thank you so much, you have been a great help, like really you just save my life. Hope & blessings you and your family. Best wishes goodbye

  • Omar PH 3 years ago

    Omg 11 fast years 😕

  • sqrqh 3 years ago

    This video is posted about 10 years ago but still helps students to this day. Tysm 💕

  • David Scott 3 years ago

    Why is this in my recommendations

  • Zacuriah Miller 3 years ago

    Wow we have successfully just made our answers less accurate on purpose 😀

  • Intello #Maniac 3 years ago

    Who’s watching it in 2019, like it!

  • NotDanny 3 years ago

    My teacher must suck at Significant Figures because he couldn’t round my 68.5635 grade to a 90.

  • Dave 3 years ago


  • Simply Toshiro 3 years ago

    2019 , any mate here ?

  • Amina Gabulzada 3 years ago


  • Prem Geetha 3 years ago

    Dude U are Awesome

  • Girjesh Mishra 3 years ago


  • Talia Herberg 3 years ago


  • Joss Ibrahim 3 years ago

    2019 frfr

  • yugioh deck profiles 3 years ago


  • Taurean Simmons 3 years ago

    just started my chemistry class this summer. thanks for this video.

  • Yan 3 years ago

    what if my life is insignificant?

  • Joey Marshall 3 years ago

    So whats the purpose of finding significant figures in the first place?

  • OT7 Stan 3 years ago

    For me math is
    Even though it’s science but still needed a computation!

  • Anaya Khan 3 years ago

    Sir I request you to explain solvay process!

  • Mohammed Hassen 3 years ago

    2019 bois?

  • Soleil Roberts 3 years ago

    2019 bois?

  • Tajalli Zehra 3 years ago

    2019, hey people wassup

  • Lidia Lopez 3 years ago

    Can someone tell me how to do this kind of videos double screen I need to make some videos for my students please help

  • Bash Zaman 3 years ago

    this is the worst video f u

  • Pierre Gerard Alvarez 3 years ago

    You’re probably in the middle of the year
    I’m trying to learn chemistry in 2 days for a placement test 🤦‍♂️

  • jazzyfunkyman 3 years ago

    My mom is forcing me to learn chemistry when i just finished 6th grade and its summer vacation.
    I hate my life

    • The48thHawk 3 years ago

      LMAO my first chemistry class is in 19 days (10th grade)

  • Ammar Farooq 3 years ago

    2019 guys???

  • Snyp arkham 3 years ago

    Einstein is angry for the ugly number, as you said it

  • Alec Carrillo 3 years ago

    Who else didn’t pay attention in class

  • Ercdared Entertainment 3 years ago

    This is the whitest video I’ve ever seen

  • nester nunez 3 years ago

    6:49 “if you’re smart…” oh, hit me right in my jellies 😑

  • Adrian Macias 3 years ago

    2019 anyone 👀?

  • OOF-ER Gang 3 years ago

    Well this wasn’t rlly what I was looking for but thx for the tips for the future of chemistry 😬

  • Muriel Amarelith 3 years ago

    At first I thought he was referring to significant historical figures lol

  • Connor Chester 3 years ago

    Anyone else just find it kinda weird that u can see time stamps from kids struggling 8 years ago and now their out of college?

    • payton odom 3 years ago

      Never really thought about it but now that you say something it is really interesting

  • Tom Trinh 3 years ago

    bro thank you so much my teacher is so fast

  • Tata :3 3 years ago

    I’m struggling 🥴

  • SillyAlliPlays Games 3 years ago

    Tell me why this guy is better than all my math teachers combined

  • Sydney Squared 3 years ago

    2019 honors chem grade has been officially saved thank you

  • Hal Menacho Segovia 3 years ago

    harvey dent ass

  • Angel Amador 3 years ago

    Use decimals next time smh common sense

  • meldeo 3 years ago

    props to this dude. he got me through high school chemistry. Currently in college and back for more man. If anyone needs help this is the channel to go to!

  • Jim Lee 3 years ago

    Play at 0.5x speed.

  • Leon Scott 3 years ago

    Yes but what if you are multiplying or dividing numbers with a different amounts of significant figures

    • kira hiebert 3 years ago

      we’re screwed

    • Leon Scott 3 years ago

      @kira hiebert oh

    • Sophie Capps-Hawkins 3 years ago

      He says it on the very end, I think it’s in the next video

  • Ryan 3 years ago

    I was half sleeping in my AP Chem class so i needed this review

  • Reva Is The Diva 3 years ago

    That didn’t help at all – Spongebob voice*

  • Balthasar The MAN 3 years ago

    2019 ma dudez?

  • Stefani Sparkle 3 years ago

    11 years later , and here I am learning from your videos

  • Nicholas R 3 years ago

    My teacher can’t teach lmao, she couldn’t explain this right to the class in 49 minutes but Tyler DeWitt can explain it successfully in 5 mins.

    • M D 3 years ago

      Nicholas R
      Lmao 💀. Good luck though 👍🏽

  • Photoshop Mini Tutorials 3 years ago

    What if I have a multiplication or division of numbers with different amounts of significant figures like 324×23
    How many significant figures do I keep on my answer?

    • Dana Love 3 years ago

      Jenn M. The least number of significant number is what you consider. So, in this case you take the 23 which is 2 sig figs

  • Gabriel Noon 3 years ago

    Let’s do that-

  • burger king 3 years ago

    i was 4 when this video was made

  • kathe rosa 3 years ago

    Saved me tysm

  • Anthony Cervantes 3 years ago

    I have a good teacher I’m just retarded

  • lil brooker 3 years ago

    hi i was just wondering that does this always work on math as well?

  • demi god 3 years ago

    I have a chemistry test today so.. here i am

  • HAXMAX 64 3 years ago

    My teacher recommended you

  • Hasib YouTube 3 years ago

    Wtfffff I’m here after 11 years

  • Sophie Capps-Hawkins 3 years ago

    he left us on a cliff hanger

  • Kehan Hu 3 years ago


  • Aryaman bahl 3 years ago


  • Breadwinner 118 3 years ago

    You’re doing gods work

  • Lucas Argandoña 3 years ago

    What if in your problem you multiply a 1? Do you round to one digit? For example 5,896,671 would be rounded to 6,000,00?

  • Crushy -_- 3 years ago

    2019 11 years after this video

  • Rachel Rakushkin 3 years ago

    Amazing, your channel helps me so much. Thank you!

  • Eric Mata 3 years ago

    2019 yeet

    • KIZUATO 2 years ago


  • Benaiah Leger 3 years ago

    we love fortnite we love fortnite

  • Eric Mata 3 years ago


    • Benaiah Leger 3 years ago


  • Eric Mata 3 years ago

    sharyland pioneer

  • Antonio Leal Trevino 3 years ago


  • Jir Tax 3 years ago

    2019 🤷🏾‍♂️

  • kysgato 3 years ago

    this makes so much sense now

  • Usman Zahidi 3 years ago

    Saved me from low marks !!!

    Ur the best!

  • Nicolastkyo 3 years ago

    What happened to the rest of the video

  • Aaron E. 3 years ago

    What if the two numbers you are dividing have a different number of digits?

  • Tyrone Baker 3 years ago

    2019 GANG BABY cause my teacher cannot do his job right so I’m here

  • Matthew Morrissey 3 years ago

    Sig figs made easy good work:)

  • Mike HAN 3 years ago

    2019 bois?

    • CodingBoi 101 3 years ago


  • Drøøling Bxby 3 years ago

    When am I going to use this like I’m not going to go in a shop and ask Linda at the counter to round the price of my beans to 2s.f

  • 음악 3 years ago

    Let’s hope I can pass my midterm today👌

  • Jayden Songwe 3 years ago

    what if the problem was like 3284 divided by 345

  • Jayden Songwe 3 years ago

    WHAT IF the 2 numbers you are multiplying aren’t the same number of SF. what if its 35x 3256

  • Easy Pacer 3 years ago

    Why cant teachers fucking teach? I have to go online for every new subject!

  • Ethan Schuck 3 years ago

    Your videos are dookie

  • Argenteus 3 years ago

    This was uploaded on my 5th birthday.

    • Jaheem Tv 3 years ago

      damn thats years ago,
      any ways can you give my channel a little support please

  • Makennah High 3 years ago

    thank u so much it helped me i was so confused now i understand better 😂💀 2019 gang

  • Ann Awad 3 years ago


  • Luca Gopoian 3 years ago

    2019 bois

  • Maddox Bellrose 3 years ago

    Well uh technically all numbers have infinite 0’s to the left side so uhhhh checkmate people who believe in bio diversity.

  • Naser Khasawneh 8A 3 years ago

    i swear i was born in the exact day
    of when he posted the video
    i was 1 second old and he was telling math that is old as me

  • JIRO 3 years ago

    Who Watch in 2019 ??

  • Usra Shkoukani 3 years ago


  • bilenbaby 3 years ago

    you just saved my life appreciate itttt

  • Hermit Card 3 years ago

    240p? This is so retro xD

  • Deron Brown 3 years ago

    Significant figures are significant because they were read off of an instrument (always estimate one decimal place beyond what you can read). All of the significant figures rules are based off of this basic measuring concept.

  • Madhav Vaithylingam 3 years ago

    2019 almost 2020 lmao

  • Sarah’s World 3 years ago

    I have a test tomorrow and did no revision so thx

  • Jota 3 years ago

    Finals anyone

  • Random Dude 3 years ago

    Still as handsome and beautiful as God damn ever

  • Francisco Rodriguez 3 years ago

    Everyone in this comment section is just hopeful of passing their chem midterms/finals as me 🥺 <3

  • Gal Gadassi 3 years ago

    this video shows that sometimes video quality is better than just camera quality

  • anna Ranadive 3 years ago

    Can you please make videos on titrations, back titrations, and redox titration calculations? Along with enthalpy questions, please? I’d greatly appreciate it!

  • ss 3 years ago

    12 years later and he is still helping students understand

  • strickHACKER 3 years ago

    Thx dude! Keep up the good work, this helped me a lot. 2020! 🙂

  • Addison Massey 3 years ago

    You look like Samwise Gamgee.

  • Lacye Hepler 3 years ago

    Thanks lol. I legit was stumped in class. This made it easy

  • Narjis Alali 3 years ago

    I have a question, could you help me please please please?
    If I mix tow different materials, such as limestone and clay. Then I mix the two materials as 80% of limestone and 20% of clay.
    Limestone have CaO about 50% while clay have CaO about 10%.
    How can I calculate the total percent of CaO in the mixture ????
    Please help me


    it 2020 and the quality of this camera…. is just…. 👌👌

  • julie delia 3 years ago

    i love you

  • Mrs. Health 3 years ago

    i’ve signed to online chemistry class, knowing that I will watch Tyler non-stop

  • Olamide Ogunsola 3 years ago

    January 22 wednesday 2:10 pm

  • Mr Cinnamon Toast IV 3 years ago

    This is guy is the definition of *M00d*

  • Musa Salman 3 years ago

    Hewwo by 2020

  • Xobile 3 years ago

    Trying to figure out if I want to do chemistry or physics

  • Intimate a.b 3 years ago

    Wooow this was incredibly helpful! Thank u so much 💞💞

  • Rodrigo Baldeon 3 years ago

    Honors Chemistry peeps?

  • Vansidhar A 3 years ago

    Your 10 year transition is like Jim’s transition from season 1 to season 9 in The Office lol

  • Aivan Aldeon 3 years ago


  • Kamilla Avezova 3 years ago


  • Nurdi 3 years ago

    we are in 2020, and I am here. Thank you so much!

  • Hassaan Mian 2 years ago


  • Evangelina Paisi 2 years ago

    How would I do 1.10cm x 2.0cm in correct significant figures. PLEASE RESPOND. I NEED HELP

  • Sumantri Sjaifuddin 2 years ago

    2020 anyone?

    • winny 2 years ago


  • Nestor Enriquez 2 years ago

    Wow 8 years ago!!!

  • Ellie123 Miceli 2 years ago

    Thanks I have a quiz today and I feel a lot better

  • Joseph Madera 2 years ago

    I hate math all it’s good for is ruining my gpa.

  • Rj Rosano 2 years ago

    What if they’re not the same number of the two numbers that would be solve?

  • shahd shosho 2 years ago

    I luv u

  • Joseph Johnson 2 years ago

    Tyler, I’m a High School Chemistry Teacher setting up to make online lectures for my students. I’ve used a lot of your videos (Thanks tremendously btw) and had a question about what equipment and presentation hardware and software you use. Any tips as well?
    Thanks again, really appreciatethe videos as do my students!

  • Dola Kesavarao 2 years ago

    Lesson is good but his head is more big………..

  • Navneet Kumar 2 years ago

    Me : (Showing my friend how accurate I am, by getting answer 3.38528)

    Tyler sir (enters the chat) : hmm, that’s an ugly answer.

  • magic castle 2 years ago

    None of the teachers or videos were able to explain the purpose but you did👏

  • Emrys Cobbett-Evans (Disgybl 2018) 2 years ago

    you look like samwise gamgee

  • PauVlogs 2 years ago

    anyone from 2020?

  • eeybisi 2 years ago

    I decided to binge-watch all of your video this quarantine, haha good luck to me. I never failed in my chemistry class but I feel like this is my weakness (I even have A grade but because I try so hard, I forgot everythng after exam). I always find this subject the hardest but I will try my best to overcome that.

  • Shakuntala Arya 2 years ago

    Any from 🇮🇳

  • DDB Gaming 2 years ago

    2020 corona homework anyone?😂

  • h4 arini 2 years ago

    I was 2 yrs old when he put this up on yt

  • Reuben De leon 2 years ago

    im in 8th grade why am i watching this

  • Sushant Gyawali 2 years ago

    Somebody here after 12 years?!

  • Sindhu Anikethana 2 years ago

    Hello… Can u please teach laws of chemical combination…

  • M1_22j 2 years ago

    Thanks a lot . ❤️🙏

  • M1_22j 2 years ago

    For this simple explanation . I really a appreciate it

  • NBML CHANNEL 2 years ago

    Hello sir Tyler❤️ I am one of your fans po since college days …Hope you’ll notice me💕💕

  • Andrew Kim 2 years ago


  • M_971 2 years ago

    anybody from the corona era ?

  • Arty Crafty 2 years ago

    sir .. i think at 4:11 it should be 3.38.. isn’t it????????????

Comments are closed.