round to a number to a suitable degree of accuracy

approximation of a number or amount, based on a calculation with rounded numbers

the operation that reverses the effect of another

estimate 63 x 28

estimate 13 + 47

estimate 157 - 96

estimate 1125 ÷ 12

estimate 17.8 x 9.9

estimate 882 ÷ 31

estimate 44.5 -23.7

estimate 239.8 x 47.64

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