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5.6×0.8×1.25脱式计算

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

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

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

0.8x(12.5-1.25) =0.8×12.5-0.8×1.25 =10-1 =9

0.91÷0.8+1.25×1.08 =0.91×1.25+1.25×1.08 =(0.91+1.08)×1.25 =1.99×1.25 =2.4875

=0.8*(1.25*0.4+2.5*0.4)=0.8*(0.5+1)=(0.8*0.5+0.8*1)=0.4+0.8=1.2

脱式计算 (1-0.8×1.25)÷0.01 =(1-1)÷0.01 =0÷0.01 =0

1.25x2.25x0.8 =(1.25x0.8)x2.25 =1x2.25 =2.25 希望能帮到你!

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