Answer
A calculator often gives more digits than the number of significant figures allowed in the answer
Work Step by Step
Each time you use a calculator, it is important to look at the original measurements and determine the number of significant figures that can be used for the answer. You can use the following rules to round off the numbers shown in a calculator display.
Rules for Rounding Off:
1. If the first digit to be dropped is 4 or less, then it and all following digits are simply
dropped from the number.
2. If the first digit to be dropped is 5 or greater, then the last retained digit of the
number is increased by 1.
