1988 AMC 8 Problem 7 — Solution | LIVE by Po-Shen Loh

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1988 AMC 8 Problem 7

Attempt Problem 7 of the 1988 AMC 8 below, then check your answer against the professionally curated solution from LIVE by Po-Shen Loh. You can also try the full timed exam, view all 1988 AMC 8 solutions, or check the answer key.

All problems are used with official legal permission of the Mathematical Association of America (MAA).

7.

The expression $2.46 \times 8.163 \times (5.17 + 4.829)$ is closest to

$100$

$200$

$300$

$400$

$500$

Answer: B

Concepts:estimation

Difficulty rating: 730

Solution:

Round each factor: $2.46 \approx 2.5,$ $8.163 \approx 8,$ and $5.17 + 4.829 \approx 10.$

The product is about $2.5 \times 8 \times 10 = 200.$

Thus, the correct answer is B .

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Problem 7 in Other Years

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