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数学
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8/9减8/9乘5/12除以3/4简便计算
人气:252 ℃ 时间:2019-09-18 05:12:32
解答
8/9-8/9x5/12÷3/4
=8/9-8/9x5/12×4/3
=8/9x1-8/9x5/9
=8/9x(1-5/9)
=8/9x4/9
=32/81
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