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1.25x0.32x2.5+2.5的简便方法

1.25x0.32x2.5+2.5 =1.25x0.8x0.4x2.5+2.5 =1.25x0.8x(0.4x2.5)+2.5 =1+2.5 =3.5

1.25x0.32x2.5 +2.5简便计算 1.25x0.32x2.5 +2.5 =2.5*(1.25*0.32+1) =2.5*1.4 =3.5

(2.5X0.4)X(1·25X0.8)=1

1.25x2.5x0.32=1.25x2.5x(8x0.4) =1.25x8x(2.5x0.4) =1x1 =1

能简便的简便 1.25×0.32×2.5 =(1.25×0.8)×(0.4×2.5) =1×1 =1

1.25×0.32×2.5+2.5 =1.25x0.8x(0.4x2.5)+2.5 =1x1+2.5 =3.5

这种题就要是凑整十,整百,25×4=100和125×8=1000是两个较常用的算式,所以原式可以如下简算 原式=2.5×1.25×0.4×0.8 =2.5×0.4×(1.25×0.8) =1×1=1

1.25×0.32×250最简方法做 =(1.25×8)×(0.04×250) =10×10 =100

解:根据拆分法和结合律的运用, 原式=1.25x(0.8x0.4)x0.25 =(1.25x0.8)x(0.4x0.25) =1x0.1 =0.1

简便计算 1.25×0.32×2.5× 2.5 =(1.25×0.8)×(0.4×2.5)×2.5 =1×1×2.5 =2.5

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