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3rd Grade Math · Question of the Day

3rd Grade Math Question of the Day

A fresh daily question to build accuracy, reinforce recall, and turn practice into a steady habit.
Sunday, September 6, 2026

A farmer plants 99 rows of corn with 2828 seeds in each row. Birds eat 4545 of the seeds before they can grow. The farmer estimates that about 200200 seeds are left to grow. Which reasoning best evaluates this estimate?

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Question of the Day

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A farmer plants 99 rows of corn with 2828 seeds in each row. Birds eat 4545 of the seeds before they can grow. The farmer estimates that about 200200 seeds are left to grow. Which reasoning best evaluates this estimate?

  1. The estimate is too low because 10×30−50=25010 \times 30 - 50 = 250 seeds left (correct answer)
  2. The estimate is reasonable because 9×30−45=2259 \times 30 - 45 = 225 seeds left
  3. The estimate is too high because 10×25−50=20010 \times 25 - 50 = 200 seeds exactly
  4. The estimate is reasonable because 10×30−50=25010 \times 30 - 50 = 250 seeds left

Explanation: Round 9 to 10, 28 to 30, and 45 to 50. Calculate: 10 × 30 - 50 = 300 - 50 = 250 seeds left. Since 250 > 200, the estimate is too low. Choice B doesn't round 9 to 10. Choice C rounds 28 down to 25, which is less accurate. Choice D has correct calculation but wrong conclusion about the estimate.