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16 March, 22:58

Estimate then find the difference or sum

86+17

+1
Answers (1)
  1. 17 March, 02:53
    0
    Estimation for addition: 86 rounds up to 90 and 17 rounds up to 20 so:

    90 + 20 = 110

    Estimation for subtraction is the same thing but with subtraction

    90 - 20 = 70

    Now for the exact answers:

    86 + 17 = 103

    86 - 17 = 69

    Your answers are 110, 70, 103, and 69.
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