Question

Which of the following expressions will produce an answer with three significant figures? Check all that apply.

A. 100 • 3.4
B. 20 - 40.8
C. 22.67 + 14.6
D. 2101 23.7

Answer 1

C: addition and subtraction use the least accurate placement to determine sig figs of the final answer, and 14.6 is less precise, so the tenths place is the most accurate we can get. I think D is also applicable because multiplication uses the number of sig figs from the number with the least sig figs.