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Question 81

Estimate 9.8 ÷ 0.49 by using the nearby benchmarks 10 and 0.5.

  1. 5
  2. 10
  3. 20Bonne réponse
  4. 50

Explication

Using the stated benchmarks gives 10 ÷ 0.5 = 20, and the exact calculation 9.8 ÷ 0.49 also equals 20. An estimate of 5 comes from multiplying the benchmarks, which is the wrong operation.

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Question 81: Estimate 9.8 ÷ 0.49 by using the nearby benchmarks 10 and… · Decimals and Place Value · Questena