9.6*0.25*12.5巧算

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9.6*0.25*12.5巧算

9.6*0.25*12.5巧算
9.6*0.25*12.5巧算

9.6*0.25*12.5巧算
9.6*0.25*12.5
=3*4*0.25*0.8*12.5
=3*1*10
=30