Significant figures:

caliper with one quarter

caliper closeup

What is the last digit?












10 quarter measure with caliper

What is the measured value?











Significant Figures and Calculations: Two basic sets of rules:

  1. Addition/Subtraction rule: Significant figures are determined by looking at the decimal place of the numbers being added or subtracted.











  1. Multiplication/Division rule: In this case we count the digits. The number with the fewest significant digits determines the number of significant digits in the answer.






© R A Paselk

Last modified 23 January 2015