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Question
Solve the following question:
Express the following sum to the appropriate number of significant figures:
319.5 g − 20460 g − 0.0639 g − 45.642 g − 4.173 g
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Solution
To perform an addition/subtraction operation, first, the numbers are written in such a way that they have the same exponent. The coefficients are then added/subtracted.
319.5 g − 20460 g − 0.0639 g − 45.642 g − 4.173 g
= − 20190.3789 g
= − 20190 g
Sum to the appropriate number of significant figures = − 20190 g
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