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AccuracyScienceMedium

What is the result of the following calculation, reported to the correct number of significant figures? $0.12\,\text{g} + 0.003\,\text{g} = ?$

Correct Answer: B — B: 0.12g

For addition, the number of decimal places must match the term with the fewest decimal places.

0.12 + 0.003 = 0.123

Rounded to 2 decimal places:

0.123 \rightarrow 0.12\,\text{g}