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Question 98

Which is the best estimate for 5.12 + 3.87?

  1. 1
  2. 9Correct answer
  3. 90
  4. 5

Explanation

Rounding to whole numbers gives 5 + 4 = 9, which is also close to the exact sum 8.99. The estimate 1 comes from subtracting the benchmarks, and 90 loses the decimal scale.

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Question 98: Which is the best estimate for 5.12 + 3.87? · Decimals and Place Value · Questena