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20/17-(3/17+3分之2)简便算法
人气:379 ℃ 时间:2020-01-27 19:30:12
解答
= 20/17 - 3/17 - 2/3
= (20 -3)/17 - 2/3
= 1-2/3
= (3-2)/3
= 1/3
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