Establish the rules in operations and significant figures and apply them to the given calculation:

**43 g + 1.00 g - 2.008 g = 41.992 g**

Remember the rules for the significant figures in calculations.

**1. For multiplication and division, measurement with the least number of significant figures shall determine the final answer. **

Example:

**2.55 x 5.2 = 13.26**

→ since 5.4 has the least significant figures of 2 (2.55 has three), the answer would be rounded up to 13 to retain the significant figures.

A calculator is used to add and subtract measured masses: 43 g + 1.00 g - 2.008 g = 41.992 g What should the numeric answer be when expressed to the correct number of significant figures?

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