两种钱各有几张——鸡兔同笼类型题
- 时间:2020-03-30 18:18:31
- 分类:数学世界
- 阅读:144 次
出纳员点一叠20元和50元的人民币共50张,总钱数是1900元,请你算出50元和20元的人民币各有多少张?
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