简算：8/7*75％+0.75*6/7-3/4
人气：116 ℃ 时间：2020-03-26 17:13:17
解答
8/7*75％+0.75*6/7-3/4
=8／7×3／4＋3／4×6／7－3/4
=3／4×(8／7＋6／7－1)
=3／4×1
=3／4
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