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能简算的简算 15/17-(10/17-1/2)=?
人气:469 ℃ 时间:2020-04-06 10:59:35
解答
15/17-(10/17-1/2)
=15/17-10/17+1/2
=5/17+1/2=10/34+17/34
=27/34
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