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    Mathematics
    Grade-4-
    Easy

    Question

    Use rounding to estimate:
    75 x 81

    1. 80 x 80 = 6400 
    2. 70 x 80 = 5600
    3. 50 x 80 = 4000
    4. 10 x 70 = 700

    hintHint:

    Rounding off the numbers and multiplying them

    The correct answer is: 80 x 80 = 6400

      75 x 81
      75 is rounding to 80
      81 is rounding to 80
      80 x 80 = 6400.

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