1.25乘4.63怎么用简便方法计算

1.25乘4.63怎么用简便方法计算

1.25x4.63
=1.25x(4.64 -0.01)
=1.25x(8x0.58 -0.01)
=(1.25x8)x0.58 -0.00125
=10x0.58-0.00125
=5.8-0.00125
=5.79875
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