Perform the following mathematical operation, and
report the answer to the
appropriate number of
significant figures.
11.65498 + 156.325 = [?]

167.980.

Explanation:

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In this case, since additions involving the display of the result with the appropriate number of significant figures involve the solution of the system without looking at them:

Considering that 156.325 is significant to the thousandths and 11.65498 to the hundred thousandths, we infer that the result should be taken to the thousandths as well as 156.325; thus, we obtain:

Because the second decimal nine is rounded to ten and therefore the 7 is taken to 8.

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