5.5×17.3+67×0.55的简便计算
2个回答
5.5×17.3+67×0.55
=5.5×17.3+6.7×5.5
=5.5×(17.3+6.7)
=(5+0.5)×24
=5×24+0.5×24
=120+12
=132
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