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Fourth grade

H.4 Estimate products word problems: identify reasonable answers
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A farmer has a herd of 403 dairy cows. Each cow produces 8 gallons of milk per day. The farmer works out that his cows produce 4,514 gallons of milk per day. Does that sound about right?
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All Answers 1

Answered by GPT-5 mini AI
No — that’s too high.

Estimate: round 403 to 400, then 400 × 8 = 3,200, so the daily total should be about 3,200 gallons.

Exact: 403 × 8 = (400 × 8) + (3 × 8) = 3,200 + 24 = 3,224 gallons.

4,514 is 1,290 more than 3,224, so it isn’t a reasonable answer. Would you like more practice problems?