Significant Figures Made Easy!

[LaurenDawley1994]

thanks this definitely helped

[Gorillasoh]

Thank for the lesson

[Abdullahtariq52]

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.

[robertareys]

very helpful ! thank you.

[aastha091]

how do i round this..?????????

333.764 to 2 significatnt figure

[tdewitt451]

@hupper12345 watch the next video, significant figures 1.2

[Allison0776]

Thank You so much for making this easy to understand. I got a tutor and was More confused when I left than I was when I started. But could you please continue explaining how to multiply and divide with different significant numbers. Example 9.98 / 98.1735 and 697.1 • 2.410

[tdewitt451]

@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!

[arribaperu]

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

[sexy19081995]

can jus fuk dis dude!!!! hot teacher;)

[Mustafa8550]

MUCH BETTER THAN MY MATHS TEACHER

[budsandblossoms]

Yay

[Ravel1299]

Thanks!

[roxsbabe]

Yay now i can take my o levels without getting massive points deducted

[MineOfDutyHD]

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 1.6x10^3, as Thelkitta said.

[toymation]

@hupper12345 2 -- it's always the lowest

[zeldagirly22]

thank you so much :-)

[theromandoughnut]

help please answer my question

round 5279 to 1 sig fig

[tiwariparam]

@theromandoughnut it would be 5000 good sir

[jennanuntavijan]

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

[Xyennirock01X]

omg u should become a teacher this help me so much

[Flipflopsandsocks99]

@hupper12345 2 sig figs! the least number of sig figs is the answer

[ras144]

Thank you for the help.

[TwilightFlip]

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

[foxysora]

@TwilightFlip yes....that is just yesss

[laxitudeeeee]

@hupper12345 next video...

[felaw]

professor john mayer

[TheIkitta]

My textbook says that your example 56x28 would be correctly written as 1.6 x 10^3 which clearly shows two sig figs. It's a good approach, right?

[tdewitt451]

@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)."

[pro2walord]

@TheIkitta: Yes it's right

[ThePineappleEater]

@TheIkitta yup



[XDSakuraBlossomXD]

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

[bigdog131000]

AAAAAh I have a TEST tomorrow.

[SingingGirl900]

Thank you so much for making this video1 Tomorrow I have a test on this and I really didn't understand it when I asked my teacher and you really helped me a lot. I will let you know how I did on the test! THANK YOU!

[pikaparty]

Oh, now I get it. :0

[bennemann]

Ok I understand it for the first division examples... but I fail to see the point of changing 1,568 to 1,600... You aren't saving on having to write any algarisms and you are voluntarily decreasing the precision of your result for apparently no benefit!

[tdewitt451]

@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]

@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 ?

[ThePineappleEater]

@bennemann he did it wrong its supposed to stay as 2 sf only 0s to the left r not significant the answer is 1.6 x 10^3

[48tank]

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

[Berwyn33]

Thank you SO much for putting this video up. In astronomy significant figures are also very important and I just could not understand it! Now it makes sense, thank you thank you!

[juanarruti]

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

[MAV3690]

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

[zreenex]

this is pre-k physics B)

[gilder37]

WOAH, that makes it easier.

[hlugopr]

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

[pureevilz28]

bo duke? is that you?

[edijjjj]

I wish my chemistry teacher taught like you because I'm pretty fast in science but my teacher made me like a retard.

[tdewitt451]

@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.

[yoj12296]

god im really slow in significant figures

[flashing511]

hi mate thanx for this useful piece of information , BUT I THINK there is sth wrong if u go through (56x28)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

[tdewitt451]

@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]

@tdewitt451 thanx yes ,,,it does .  sorry for interrupting :)

[Bunfire123]

lol very helpful

[Mecksay]

I LOVE YOU MY MATH TEACHER IS SHITE! :)

[supertalap1]

holy shit! I LOVE YOU HAHAHAHA

[K2S192]

Love you dude (no homo)

[rlim6]

cliffhanger.

[1966lavc]

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

[eegzon22]

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

[sargonashoraia]

thanks for the video it is very useful

[bigtdriver]

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

[orchid1software]

thank you so much this is a perfect tutorial.

[baggedyman]

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

[jobrosalldaway68]

thankyou! my chem teach can't teach to save his life.

[AdorableNinja19]

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^

[spaz84335]

Thank you so much!! I didn't understand it at all in my chem class and watching this and all the other vids that you made...were fantastic in helping me!!!!

[aznxboy1228]

are the rules the same for adding and subtracting?

[tdewitt451]

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

[aznxboy1228]

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

[tdewitt451]

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

[ramzeen7]

you mean 0. bla bla bla

[ramzeen7]

thanks allot dude, 

[Kinin4]

@buen0brim0

That's why we like him. xD

[Cubano407]

This is the only reason why i don't have "A" in my AP Chemistry class, stupid sig figs

[picknutpeach]

When do you use scientific notation with significant figures? 

[percyharvinfan8]

Thank you so much! I am definitely going to be passing my chemistry test tomorrow!

[SalgadoHelena]

THANKSSSSSSSSS!!!!! THAT WAS REALLY REALLY GOOD YOU SAVED ME! I ALWAYS WATCH YOUR VIDEOS :)

[TheShanedell]

watching that just made my day

[On3Sound]

The whole multiple angle thing was tripping me out

[aznrapper100]

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

[HaloH77]

thank you :)

[sasoripwnage]

Wow 100x Easier thanks.

[TheEazyDuzIt95]

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

[TheEazyDuzIt95]

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.

[XpianoxboyX]

you should work for youtube.

[polkadotbeautyblog]

wow thanks this really helped

[kiduel]

Great!!! it helped a lot,

[pprithvi13]

THIS REALLY HELPFUL =)

[pprithvi13]

THIS IS REALLY HELPFUL THANKS =)

[kaosmotorsports]

That's a repeating decimal. Just saying

[DangoPup]

Thanks so much~ >.<

[Kindara360Spades]

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

[artelunar]

Thank you for this video. It helped me a lot.

[BengBengCat]

Thank you!

[summiebee]

Excellent! Thanks for the refresher! ~Summer

[swiitiichiil]

HOW COME IT'S I.5 .. MY ANSWER IS 1.50

[tdewitt451]

@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.

[R4t3rS]

@swiitiichiil its the sme dont add zeros



[tomandjerry600t]

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

[JamesH4K]

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

[eamon132]

I am doing this in maths and i have to say this is the most useful significant figures help I have ever had!Thanks for the help!

[dracula19148914]

Thnx Man U r really a good teacher. However I never got the teacher in the class...

It was really helpfull

[Kidrazor96]

This is pure genious, Best revision EVER

[imundiath]

Thanks! 5/5 *

[Untravaersil]

Help me out here: using significant digits, would 6 X 6 = 40?

[tdewitt451]

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.

[Kidrazor96]

@tdewitt451 What if it was something like:

67 X 8 = ???

There's 2 digits on one side and only 1 digit on the other

[josh3367]

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

[tdewitt451]

@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.

[ifafv]

@Untravaersil

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.

[yeesnaw]

okl, just got to the end of the vid :P

[yeesnaw]

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?

[LFCKop8]

if i were to kill my current teacher, would you be able to teach at my school

hahaha

[bdbbyx3]

My chemistry teacher said if the number right of the figure that is to be last is 5, to round the number so that it will even. Why did she say that?

[tdewitt451]

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.

[summiebee]

Ugh! Thanks! I am so not a Chem lover. More of an English girl! This helped SO much! Now if you could just go chapter by chapter so I don't bawl all semester we'll get along just fine! ;) Hehe!

[XOXOAngeliniAntanori]

omg thank you soooo much ^_^ very helpful!

[ndog33]

thnx for the vids, and do u no proffessor edward berger cuz he has the same style of video, a video in from in the top right and hands showing with the work

[smartboy007112]

This Is Very Helpful For Me...

You Know Why....

Because When I Learn It On My Class Sir Teach Me And Solve All Problems. I Have Not Any Problem Solve...

But Your Video Help Me To Much

Thnx Alot.

[chailizard]

5:09 hahaha multiplecation.

[nanotech71]

This video saved my life in Chemistry

[wazza0593]

~Thank you So MUCH!!!!!

[minjihasnolife]

thanks this really helped me

[Falcon14785]

nice of you to try to help people with this

[soccerkjr]

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

[TheCandicevasquez]

i hate my physics teacher his so complicated...

[mnvlove]

THIS IS SO HELPFUL.

my chem teacher is so bad at teaching.

[linda83514]

@mnvlove do you have Mr.V? hhaha

[rickyrickyly123]

Thank you so much....

i had trouble understanding it during class in chem. Honors, thanks to your helpful and easy to understand (as well as close up) tutorial, it's gonna help me a lot

thanks thanks thanks!!!!

[knash2011]

THANK YOU SO MUCH!

[tdewitt451]

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

[misscindychang2009]

This is a great video! Very helpful!! Thanks!

[Kadgarth]

I wonder why he always chose two numbers with the same amounts of digits...

Anyway, you take the lower number.

I.E.

2451 x 144 = 3 sig digits.

[tdewitt451]

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

[9jar9]

well how many do you round when you have a uneven amount of numbers like 231/24

[tdewitt451]

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?

[insatiableso]

I love how in pretty much any other kind of video on you tube you get a bunch of people insulting each other and slinging hate slurs around, but in the sig fig videos it's all constructive comments and compliments.

Gotta love ye olde education, hey?

[bearsfan547]

Thanks a lot. I really like the video, helped a lot.

[SimmingLemming]

OH! Doesn't matter about my last comment. IU get it! XD

[SimmingLemming]

Thanks..

But what if... Say you had

39.3909

And fyou ad to round to 3SF would it be 3.390 or 3.3909 cus 0 doesn't count?

[msareyou4real]

3.385 rounded becomes 3.38 because with 5, if the preceeding number is even, you round down, and if its odd, you round up......?!?!?!

[tdewitt451]

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!

[iluvwiki]

no, if it's 5 or higher you round up. if it's 4 or lower, you round down. get it?

[Makun93]

i got a maths test this thus need help badly

[electoman99]

How would you turn 895.23 into 2 significant figures?

[nellezor]

Its 90 (2sf)

[iluvwiki]

895.23 to 2 significant figures is 900. that is because 895.23 to 2 significant figures is 895, the 5 rounds up, and you end up with 900.

[LilyVibeStation]

*Sorry 56x28 should then become 1.6 x 10^3

[LilyVibeStation]

You made a mistake with 56x28. It does equal what you said it does, however, because you only have 2 significant digits in your equation your answer should only have two significant digits. It should then become 1.6.

[tdewitt451]

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.

[LilyVibeStation]

Yes, I understand now that they are exactly the same thing. Thank you!

[anmpir]

Wonderful service you did for students. Much love!

[iBlissTV]

This is so simple. I can't believe I didn't understand this before. Thanks!

[polos505]

thanks for helping man!

[utunnel100]

he looks like sam from Lord Of The Rings

[TVBAngel]

thank you so much!

[globalcannibal77]

you really saved me, man.

thanks alot.

[theshark2005]

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

[gdep1]

thanks, this really helped

[DryWhater]

thnx 4 the help

[Sgtsoup117]

THanks alot man!

[thoushaltbepwnt]

thanks sooooo much

[devilskullsixtysix]

Dude you made this really simple thank you very much! :D

[grade1A1dro1puffa]

what about 4 sig figs divided by 2 sig figs.... how many sig igs does ur answer need?

[tdewitt451]

2 sig figs. it's always the lowest number.

[02x9]

Is it always the lowest number for multiplication,addition and subtraction as well? And what about operations with fractions and decimals, how do you determine the amount of sig figs they have?

[PoXiMaT]

You are the bomb.

[thelovelessgod]

hey tnx tc!

[gossipsparks]

you helped me so much