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39分之16除14分之9加39分之16乘9分之4
人气:340 ℃ 时间:2019-12-17 09:17:50
解答
16/39÷9/14+16/39×4/9
=16/39×14/9+16/39×4/9
=16/39×(14/9+×4/9)
=16/39×18/9
=16/39×2
=32/39
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