有个题目是讲三个人去住店本来是30块,最后怎么就29了?那一块钱哪去了?谢谢了,大神帮忙啊最好能讲清楚点,感谢
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![有个题目是讲三个人去住店本来是30块,最后怎么就29了?那一块钱哪去了?谢谢了,大神帮忙啊最好能讲清楚点,感谢](/uploads/image/z/644929-25-9.jpg?t=%E6%9C%89%E4%B8%AA%E9%A2%98%E7%9B%AE%E6%98%AF%E8%AE%B2%E4%B8%89%E4%B8%AA%E4%BA%BA%E5%8E%BB%E4%BD%8F%E5%BA%97%E6%9C%AC%E6%9D%A5%E6%98%AF30%E5%9D%97%2C%E6%9C%80%E5%90%8E%E6%80%8E%E4%B9%88%E5%B0%B129%E4%BA%86%3F%E9%82%A3%E4%B8%80%E5%9D%97%E9%92%B1%E5%93%AA%E5%8E%BB%E4%BA%86%3F%E8%B0%A2%E8%B0%A2%E4%BA%86%2C%E5%A4%A7%E7%A5%9E%E5%B8%AE%E5%BF%99%E5%95%8A%E6%9C%80%E5%A5%BD%E8%83%BD%E8%AE%B2%E6%B8%85%E6%A5%9A%E7%82%B9%2C%E6%84%9F%E8%B0%A2)
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