作业帮7.7/1.54+1.54/0.7简便方法计算
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7.7/1.54+1.54/0.7简便方法计算
7.7/1.54+1.54/0.7简便方法计算
7.7/1.54+1.54/0.7简便方法计算
7.7/1.54+1.54/0.7
=7.7/(0.2×7.7)+(2.2×0.7)/0.7
=1/0.2+2.2
=5+2.2
=7.2