Which calculation gives the best estimate of 6,092 ÷ 29?

Answer and explanation

Correct answer: B. 6,000 ÷ 30

  1. Step 1: Round each number to one significant figure, or to a friendly value: 6,092 is close to 6,000 and 29 is close to 30. Step 2. 6,000 ÷ 30 = 200 is easy to compute and is close to the true value of about 210. Answer: 6,000 ÷ 30. Why not the others: 6,000 ÷ 20: This rounds 29 down to 20, a very poor approximation. 7,000 ÷ 30: This rounds 6,092 up to 7,000, which is too far from the original. 6,100 ÷ 3: This divides by 3 rather than 30, so the answer would be ten times too big.

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