General Explanation of sig figs

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Jordan Sandoval 4L
Posts: 6
Joined: Wed Sep 21, 2016 2:56 pm

General Explanation of sig figs

Postby Jordan Sandoval 4L » Sat Jan 28, 2017 11:24 pm

As we all know Lavelle does emphasize significant figures in his quizzes and tests, but in my high school I was never actually taught much about them or how to use them in my calculations. Would anyone who knows them well care to explain?

Jennifer Ngo 1M
Posts: 23
Joined: Sat Jul 09, 2016 3:00 am

Re: General Explanation of sig figs

Postby Jennifer Ngo 1M » Sat Jan 28, 2017 11:36 pm

1. Zeros don't count... (i.e 400 has one sigfig)
2. UNLESS it is after a decimal (i.e 4.0 has two sigfigs and 40.0 has three)

General rule of thumb is to not round anything until your final calculation aka the answer.

Once you get the answer, you take the count of the number that has the least sigfigs in the question. If the question has the numbers 45, 25.0, and 1750, your final answer should have two sigfigs (cause 45 has two sigfigs)


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