1.25*7.2怎么巧算
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1.25*7.2怎么巧算
1.25*7.2怎么巧算
1.25*7.2怎么巧算
=1.25*8*0.9
=10*0.9
=9
1.25*7.2=1.25*4*1.8=5*1.8=9
换成分数,(5/4) * (36/5) ,约掉就行了,结果是9
提取7.2的公因数
=1.25×8×0.9
=10×0.9
=9
1.25*7.2怎么巧算
1.25*7.2怎么巧算
1.25*7.2怎么巧算
=1.25*8*0.9
=10*0.9
=9
1.25*7.2=1.25*4*1.8=5*1.8=9
换成分数,(5/4) * (36/5) ,约掉就行了,结果是9
提取7.2的公因数
=1.25×8×0.9
=10×0.9
=9