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Which Estimate Is Closest to the Exact Answer?

publish date: 2026/05/10 01:29:57.706429 UTC

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The exact answer to \(67 \times 834\) is 55,878. Which front-end rounded estimate is closest?

\(70 \times 800 = 56{,}000\)

\(60 \times 800 = 48{,}000\)

\(70 \times 900 = 63{,}000\)

\(60 \times 900 = 54{,}000\)

Correct Answer

\(70 \times 800 = 56{,}000\)

Explanation

Front-end rounding: \(67 \to 70\) (nearest ten, 7 ≥ 5 → round up) and \(834 \to 800\) (nearest hundred, 3 < 5 → round down). Estimate: \(70 \times 800 = 56{,}000\) — only 122 away from 55,878.

Reference

go-math-science.com

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