4.2*0.75+7.52怎样简便运算?
1个回答
4.2*0.75+7.52
=（4+0.2）x0.75+7.52
=4x0.75+0.2x0.75+7.52
=3+0.15+7.52
=3.15+7.52
=10.67
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