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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

2.5*0.4*0.8*1.25 1*1 1

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

解: 1.25x2.5x0.32 =(1.25*0.8)(2.5*0.4) =1*1 =1

2.5x1.25x0.32 =2.5×1.25×(0.4×0.8) =(2.5×0.4)×(1.25×0.8) =1×1 =1

1.25x0.32x0.25 =1.25x(0.8x0.4)x0.25 =(1.25x0.8)x(0.4x0.25) =1x0.1 =0.1

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

=0.04×8×2.5×1.25 =0.04×2.5×8×1.25 =0.1×10 =1

第一个40*2.5-0.4*2.5就好第二个就是(99+1)*0.32第三个就是1.25*0.8*9.7就好第四个的话好像是4.86/(1.2-1)第四个不是很确定

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