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1.25乘以0.5乘以2.5乘以6.4的简便方法

1.25乘以0.5乘以2.5乘以6.4的简便方法1.25乘以0.5乘以2.5乘以6.4=(1.25*8)*(0.5*2)*(2.5*0.4)=10*1*1=10

0.5乘1.25乘2.5乘6.4乘7=0.5x1.25x2.5x2x4x0.8x7=(0.5x2)x(1.25x0.8)x(2.5x4)x7=1x1x10x7=70

=(8*1.25)*(0.8*2.5)*1.3=10*2*1.3=26

(1.25+0.5+2.5)*6.4=1.25*6.4+0.5*6.4+2.5*6.4=1.25*0.8*8+3.2+2.5*0.4*16=1*8+3.2+1*16=8+3.2+16=11.2+16=27.2

1.2乘以2.5乘以6.4=(1.2*5)*(0.5*6.4)=6*3.2=19.2

1.25乘64乘2.5乘0.5=1.25*8*4*2*2.5*0.5=(1.25*8)*(4*2.5)*(2*0.5)=10*10*1=100

6.4*2.5*1.25=(2*4*0.8)*2.5*1.25=2*(4*2.5)*(0.8*1.25)=2*10*1=20愿对你有所帮助!

=1.25*8*0.8=8.

6.25*1.25*6.4=6.25*8*1.25*0.8=50*1=50 6.25*1.25*6.4=6.25*8*1.25*0.8=50*1=50

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