8 posts • Page 1 of 1
You should round based on your smallest sig figs from the information that the problem itself gives you. They represent the accuracy of your measurements, so you can only be as accurate as what is already given.
Just an additional note about rounding that was new to me upon entering this class: when you round based on the smallest number of sig figs and the digit immediately after your last is 5, you do not always round up. You round to the nearest even number. For instance, if you get an exact answer of 2.45 g, and you need to round off to 2 sig figs, your final answer would be 2.4, not 2.5, because 4 is the closest even number.
When calculating I try to use as many decimal places as I can (usually four to five decimal places) to get the most accurate answer. For the answer, I would round it to however many sig figs was given in the question.
Typically, I avoid rounding until the end of the problem so I can get as precise of an answer as possible. I usually leave 6 decimal points and then when I finish all my calculations, I round based on the number of sig figs given in the problem.
Who is online
Users browsing this forum: No registered users and 1 guest