www.qcfz.net > 1.6X7.5x1.25 = =

1.6X7.5x1.25 = =

1.6x7.5x1.25 =0.4x4x7.5x1.25 =1.25x4x0.4x7.5 =5x0.

1.6X7.5x1.25 =8*02*75*125 =(02*75)(8*125)=15*10=15

简便计算方法如下: 1.6×7.5×1.25 =2×0.8×7.5×1.25 =(2×7.5)×(0

1.6x7.5x1.25 =2×0.8x7.5x1.25 =(2x7.5)x(0.8×1.25)

1.6×7.5×1.25 =2×0.8×7.5×1.25 =(2×7.5)×(0.8×1.25) =

1.6x7.5x1.25 =0.2×8×7.5×1.25 =(0.2×7.5)×(8×1.25) =

解:采用拆分法和结合律, 原式=1.6x7.5x1.25 =2x0.8x7.5x1.25 =(2x7

解析:通过观察,首先把1.6拆分成2乘以0.8,然后运用乘法结合律,将2和7.5相乘,0.8和1.2

解: 由1.6=8x.02得: 1.6x7.5x1.25=.(0.2x7.5)x(8x1.2

1.6X7.5X1.25 =0.2x8x7.5x1.25 =(0.2x7.5)x(8x1.25)

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