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17.2/[(3又五分之二-1.25)*三分之二]
人气:265 ℃ 时间:2019-11-12 23:08:56
解答
17.2/[(3又五分之二-1.25)*三分之二]
=17.2/[(17/5-5/4)*2/3]
=17.2/(43/20*2/3)
=17.2/(43/30)
=12
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