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1.5X0.32X1.25的简便算法

=1.5ⅹ0.4ⅹ(0.8ⅹ1.25)二 =0.6ⅹ1 =0.6

1.5×0.32×1.25 =(1.5×0.4)×(0.8×1.25) =0.6×1 =0.6 5.24+5.24×99 =5.24×(1+99) =5.24×100 =524 0.8×[13-(3.12+5.28)] =0.8×(13-8.4) =0.8×4.6 =(1-0.2)×4.6 =4.6-0.92 =3.68 7.45×5.2÷2.6 =7.45×(5.2÷2.6) =7.45×2 =14.9

2.5*0.4*0.8*1.25 1*1 1

答:把0.32拆成0.4×0·80.32x2.5x1.25=1x1=1

1.25×2.5×0.32 =1.25×2.5×0.4×0.8 =(1.25×0.8)×(2.5×0.4) =1×1 =1

1.25×0.32×1.25 =(1.25×0.8)*(0.4×1.25) =1*0.5 =0.5

2.5x0.32x1.25 =(2.5x0.4)x(0.8x1.25) =10x1 =10

8/25×5╱4×1╱8=1╱20=0.05

25x0.32x1.25=(25x4)x(0.08x1.25)=100x0.1=10.

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