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5.6×0.8×1.25脱式计算

1.25x9.97x0.8 =1.25x0.8x9.97 =1x9.97 =9.97

5.6×0.8×1.25脱式计算 解:采用分配律, 原式=5.6x(0.8x1.25) =5.6x1 =5.6

4.2×(1.25乘以0.8) =4.2x(1.25x0.8) =4.2x1 =4.2

解:采用乘法交换律, 原式=1.25×0.96×0.8 =1.25×0.8×0.96 =1×0.96 =0.96

1.25*(8+0.8) =1.25*8+1.25*0.8 =10+1 =11

39×1.25+ 0.8 =(40-1)x1.25+0.8 =40x1.25-1x1.25+0.8 =50-1.25+0.8 =50-1-0.25+0.8 =49+0.8-0.25 =49+0.55 =49.55 谢谢,请采纳

1.25×0.8+0.2÷1,25 =1+0.16 =1.16。

1.25x0.7x0.8 =1.25x0.8x0.7 =1x0.7 =0.7

=1.25×0.8×2/3×1/2=1×1/3=1/3

3,2÷o,8÷1,25=3,

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