1.25*3.6简便算法1.25*3.6简便算法啊!

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1.25*3.6简便算法1.25*3.6简便算法啊!

1.25*3.6简便算法1.25*3.6简便算法啊!
1.25*3.6简便算法
1.25*3.6简便算法啊!

1.25*3.6简便算法1.25*3.6简便算法啊!
1.25*3.6
=1.25*4*0.9
=5*0.9
=4.5

1.25*3.6
=(1+0.25)*3.6
=(1+1/4)*3.6
=3.6+0.9
=4.5

1.25*(4-0.4)=1.25*4-1.25*0.4=5-0.5=4.5