棋子数目问题
- 时间:2020-03-30 18:18:31
- 分类:数学世界
- 阅读:142 次
有三堆棋子,每堆棋子数一样多。都只有黑白两种颜色,第一堆中的黑子,和第二堆中的白子一样多。第三堆中的黑子占全部黑子的2/5,求三堆棋子中,白子占全部棋子的几分之几?
(这个题目有点绕人,如果一时想不明白,还是先画线段图表示吧!)
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