Calculations and Significant Figures

**Multiplication/Division:**Measurement with**least number of significant figures**determines the**final answer****Addition/Subtraction:**Measurement with the**least number of decimal places**determines**final answer**

1.86 x 10^{-2} → 2 decimal places

3 x 10^{-4} → *least decimal place** (0)*

3.1 x 10^{-3 }→ 1 decimal place

Do each calculation and give the answers to the correct number of significant figures.

1.8610^{-2} + 310^{-4} - 3.110^{-3}

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