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1.25×0.32×2.5 2.5怎么简便计算

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

乘法结合律

=1.25×0.8×0.4×2.5+2.5 =1×1+2.5 =3.5

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

1

2.5*0.4*1.25*0.8

答:把0.32拆成0.4×0·80.32x2.5x1.25=1x1=1

(1)2.5×32×1.25 =(2.5×4)×(8×1.25),=10×10,=100;(2)(512+56-38)÷124=(512+56-38)×24,=512×24+56×24-38×24,=10+20-9,=21;(3)719×67+1319÷76-67=719×67+1319×67-67,=(719+1319-1)×67,=119×67,=6133.

1.25×0.52×2.5怎么简便计算 1.25×0.52×2.5 =1.25x4x0.13x2.5 =5x2.5x0.13 =12.5x0.13 =12.5x0.1+12.5x0.03 =1.25+0.375 =1.625

2.5*0.32*1.25 =(2.5*4)*(1.25*0.08) =10*1 =10

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