6.31*0.25-4.31/4的简便计算

问题描述:

6.31*0.25-4.31/4的简便计算

6.31x0.25-4.31÷4
=6.31x0.25-4.31x0.25
=(6.31-4.31)x0.25
=2x0.25
=0.5
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