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5/17除以9/8+1/9*5/17=多少
人气:429 ℃ 时间:2019-09-17 19:24:53
解答
5/17÷9/8+1/9×5/17
=5/17×8/9+1/9×5/17
=5/17×(8/9+1/9)
=5/17×1
=5/17
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