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简便计算:[5/6-(5/12-2/5)]÷7/18
人气:267 ℃ 时间:2020-05-18 02:53:01
解答
[5/6-(5/12-2/5)]÷7/18
=[5/6-5/12+2/5]*18/7
=[5/6+2/5]*18/7
=15/7+36/35
=111/35
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