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数学
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(1又3/4-7/8-7/12)/7/8
简算
人气:457 ℃ 时间:2020-02-05 16:08:12
解答
(7/4-7/8-7/12)/7/8
=(42/24-21/24-14/24)*8/7
=7/24*8/7
=1/3
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