How to Use Significant Figures in Calculations

Use Significant Figures in Calculations. Mr. Causey discusses how to use significant figures (sig figs) in your measurements and calculations.
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Mr. Causey discusses how to use significant figures (sig figs) in your measurements and calculations. It is important to maintain the integrity of your data when performing calculations. You are limited by your least precise measuring device and your calculations should reflect this limitation. Therefore, when performing addition or subtraction use the measurement with the least precise place value for the number of sig figs. When performing multiplication or division use the measurement with the fewest digits for the sig figs.

[@carbode1649]

MR causey. huge chem test tomorrow and watched all your videos. Great help keep it up thank you.

[@Ppylv]

wow thank you so much, i was not understanding this at all in my APES class and this helped a lot, it's so clear now thank you.

[@mrcausey]

You are welcome. Thank you for commenting.

[@mrcausey]

Do the multiplication and sig figs, then the addition and sig figs. 5.6 x 4.2 = 23.52 so 24 (only 2 sig fig) 24 + 8.99 = 32.99 so 33 (least precise place value the ones place)

[@RoddyRizz]

Great help, thanks!

[@dandrite]

Thank you kind sir. This is great.

[@cheesecake1098]

Thanks, this helped me with my Chemistry exam!

[@mathsmagician6949]

So clear and easy to understand!

[@mrcausey]

Thank you!

[@carfreakforever]

Very nice! Super helpful!

[@mrcausey]

Glad it was helpful! Thank you for watching!

[@SGB1977]

Came to your site through Chemistry class at Central State University - Ohio. Thanks!

[@mrcausey]

Thanks for watching and commenting.

[@emanbob5543]

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[@kendellp17]

This is better than some college courses. Thanks. I realize though, if your taking a math course while taking a science course, the science calculations are some much easier. Math helps with everything.

[@sandhya_vn]

do we convert the answer to sig. figs regardless of the units? For e.g. if im given 278.5K, would it be 5.5 degrees C or 0 deg. C (because least specific would b the hundreds place?) or 6???? and how about 80-6? would it b 74 or 70?? thank u

[@mrcausey]

Okay, 278.5 - 273.15 = 5.35 = 5.4 w/S.F. The sig figs would be determined by the measurement not the conversion. 80 - 6 = 74 = 70 w/S.F. The 80 determines the sig figs. 80. - 6 = 74 =74 w/S.F. both the 6 and 80. are to the units.

[@sandhya_vn]

Mr. Causey thank u very much!

[@sandhya_vn]

Mr. Causey but wat if we were given 273....not 273.15....then would 278.5-273 be 6?

[@mrcausey]

Yes

[@rubyalfaro2576]

tysvm this was very helpful!

[@mrcausey]

You're welcome! Thank you so much for watching.

[@emmanuelajanelegaspi6051]

Mr. Causey but how can I add the two unlike terms like 2cm^2+4cm

[@mrcausey]

You can't.

[@waynegwata8587]

Thank you thank you thank youuu sooooo much❣️❣️❣️

[@mrcausey]

You're welcome. Thank you for watching!

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I love your intro of how intelligence is needed.

[@mahadevfugare1147]

Very nice

[@yoshimangmail7581]

Thx bro really like the the vid 😎❤️

[@mrcausey]

You're welcome. Thanks for commenting.

[@chrisd185]

thank you sir

[@mrcausey]

You're welcome.

[@estefany4930]

very helpful!

[@mrcausey]

Thank you for watching!

[@eninetynine9936]

Wow and I thought I dealt with nerds... Seriously guys there's this thing out there called "life" which you can experience when you aren't trying to correct his math.

[@lamontgolden5200]

+E Ninety nine I feel you, but when most folks aren't confident in their math skills, the smallest of errors throws them for a loop -- at least, this is what happens with my chemistry students, so I understand the correction, and I'm sure Mr. Causey does too.

[@bhanuchandar6126]

Good explanation sir.

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this is good for a job

[@danielwithaglokkaaa2975]

I hate my science teacher her name is Ms. Bruhns but your the best subbed and liked

[@mrcausey]

Thank you for watching and subbing.

[@danielwithaglokkaaa2975]

No thank you

[@biliussteed2102]

One could watch those videos, or one could consult a geek or nerd.

[@mrcausey]

Thanks for commenting!

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he responded!

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I got 25.1076161...

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