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(5/6+7/8-5/12)÷1/24
rt
人气:154 ℃ 时间:2020-01-26 13:35:06
解答
(5/6+7/8-5/12)÷1/24
=(5/6+7/8-5/12)×24
=5/6×24+7/8×24-5/12×24
=20+21-10
=31
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