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4 October, 01:32

Estimate the sum of 21+17.

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Answers (2)
  1. 4 October, 01:38
    0
    40 Is The Sum Of 21+17.
  2. 4 October, 01:39
    0
    When estimating sums, you need to round to get to the answer.

    So in the problem:

    21+17 = ?

    I round 21 to 20.

    I round 17 to 20.

    So know, the problem is:

    20+20

    The answer to 20 + 20 equals 40.

    The answer is 40.
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