Discussion
\(13.08 \times 24.98 + \sqrt{624}\) = ?
Answer: C
The value is approximately 350.
Round each part to a convenient number:
\[ \begin{aligned} 13.08 \times 24.98 &\approx 13 \times 25 = 325 \\ \sqrt{624} &\approx \sqrt{625} = 25 \\ 325 + 25 &= 350 \end{aligned} \]
The exact value is about 351.7, so 350 is the nearest option. 375 and 380 overestimate the product, and 320 drops the square root term.
In approximation questions the options are usually far enough apart that rounding each term to the nearest convenient value is enough; here the gap between 350 and its neighbours is 25 or more.
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