Adding and Subtracting Sig Figs - Tecumseh Local Schools

Adding and Subtracting Sig Figs

Adding and Subtracting Significant

Figures

? When adding and subtracting decimals, the answer must have the same number of digits to the right of the decimal point as there are in the measurement with the fewest digits to the right of the decimal.

? Step #1 ? Calculate an answer

? Step #2 ? Identify the number in the problem with the fewest digits to the right of the decimal

? Step #3 ? Round your answer so that it has the same number of digits to the right of the decimal as the number in Step #2

? Examples

Example

2.21 - .012 __________

Multiplication and Division of Significant Figures

? When multiplying or dividing, the answer can have no more significant figures than are in the measurement with the fewest number of significant figures

? Step #1 ? Calculate the Answer ? Step #2 ? Identify the number in the problem with

the fewest number of significant figures ? Step #3 ? Round your answer to the same number

of significant figures as the number is Step #2

? Ex.

20.1 X 5.2 ______

Examples

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