12.5-25*0.5的简便算法

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12.5-25*0.5的简便算法12.5-25*0.5的简便算法12.5-25*0.5的简便算法=12.5-25/2=12.5-12.5=025÷2=12.512.5-12.5=0

12.5-25*0.5的简便算法
12.5-25*0.5的简便算法

12.5-25*0.5的简便算法
=12.5-25/2
=12.5-12.5
=0

25÷2=12.5
12.5-12.5=0