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算一道题，3分钟找不到答案问你的孩子
snowday
(darksky)
A,B,C 各出10元由A去买一样东西，一天后，商店退回5元，A 藏下2元后，当众各分了一元，则每人花9元，现在来看 9+9+9+2=29 为什么少了一元？
(#235967@0)
Last Updated: 2001-10-24
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算一道题，3分钟找不到答案问你的孩子
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