2+7.25/（31-29.55）能怎么简便计算就 - 知识问答

2+7.25/（31-29.55）能怎么简便计算就怎样计算

1个回答

3.2+7.25/(31-29.55)
=3.2+7.25/[(30-29)+(1-0.55)]
=3.2+7.25/[1+0.45]
=3.2+7.25/1.45
=3.2+(7.25x500)/(1.45x500)
=3.2+(725x5)/725
=3.2+5
=8.2

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