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(-31/6)-(-7/4)-(+23/6)-(-88/7)-(+88/7) 等于多少?
人气:444 ℃ 时间:2020-05-19 18:43:21
解答
(-31/6)-(-7/4)-(+23/6)-(-88/7)-(+88/7)
=-31/6-23/6+7/4+88/7-88/7
=-9+7/4
=-29/4
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