Integers and Exact Numbers- Sig Figs  [ENDORSED]

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404975170
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Joined: Thu Jul 27, 2017 3:00 am

Integers and Exact Numbers- Sig Figs

Postby 404975170 » Thu Oct 05, 2017 8:13 pm

Can someone clarify what it means in Appendix 1C when it says "In multiplication and division by an interger or an exact number, the uncertainty of the result is determined by the measured value."?

Jessica Beroukhim 3K
Posts: 21
Joined: Fri Sep 29, 2017 7:07 am

Re: Intergers and Exact Numbers- Sig Figs  [ENDORSED]

Postby Jessica Beroukhim 3K » Thu Oct 05, 2017 9:30 pm

It means that when you multiply or divide given numbers you have to base the sig figs on the measured numbers that were given to you. You can never be more accurate than the measurements given/the measuring tools you use, so you can't have more sig figs in your answer (when multiplying/dividing) than in the givens.

Vasiliki G Dis1C
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Joined: Fri Sep 29, 2017 7:04 am

Re: Intergers and Exact Numbers- Sig Figs

Postby Vasiliki G Dis1C » Thu Oct 05, 2017 9:32 pm

I think this means that you don't use the integer value as your lowest number of sig figs. For example, if you are multiplying 3 by 5.5, you would look at 5.5 which has 2 sig figs, and not the 3 which only has one. Hope this helps!

Maddie Hong 1I
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Joined: Fri Sep 29, 2017 7:04 am

Re: Intergers and Exact Numbers- Sig Figs

Postby Maddie Hong 1I » Fri Oct 06, 2017 2:14 pm

Just to add on, only base your sig figs off of values/measurments the problem gives you, not on conversion factors or any other numbers you introduce into the problem yourself.

Evelyn L 1H
Posts: 67
Joined: Fri Sep 29, 2017 7:05 am

Re: Intergers and Exact Numbers- Sig Figs

Postby Evelyn L 1H » Fri Oct 06, 2017 9:28 pm

Also, to add on, it would be best to save your rounding of sig figs until the last step for the most accurate answer.


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