Significant Figures - Calculations - Addition and Subtraction

Question 1

How do you Add or Subtract Significant Figures?

Answer 1

You add or subtract like normal and follow the rule. Round up or down if necessary.

Question 2

What is the Rule for Adding or Subtracting Significant Figures?

Answer 2

Final answer does not contain any more digits to the right of the decimal point than does the measured number with the least number of digits to the right of the decimal point.