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0.25x(8+0.4)x1.25怎么简便计算

0.25x(8+0.4)x1.25=0.25*(8x1.25+0.4*1.25)=0.25*(10+0.5)=0.25*10+0.25*0.5=2.5+0.125=2.625

(0.25x0.4)x(1.25x8) 0.1x10=1

解:0.25x(8+4)x1.25=0.25x8x1.25+0.25x4x1.25=0.25x(8x1.25)+(0.25x4)x1.25=0.25x10+1x1.25=2.5+1.25=3.75

1.25*8*0.25*0.4=10*0.1=1

0.25x(0.4+0.8)x1.25 =0.25x4x(0.1+0.2)x1.25 =1x0.3x1.25 =0.375

0.4*0.25 1.25*8

0.25*8*0.4*1.25=(0.25*0.4)*(8*1.25)=0.1*10=1

简便计算1.25*0.25*8*0.4=(1.25x8)x(0.25x0.4)=10x0.1=1

0.25x1.25x0.4x8=0.25x0.4x1.25x8(乘法交换律)=0.1x100=10

(0.25+0.8)乘(0.4+1.25)

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