24点题：给定2、6、9、9四个数，可任意用括号和+、-、×、÷四则运算，每个数只能用一次，写出一个得数为24的算式是（）。

数学题解答：这道算24点的题，用一般的方法在整数范围内是不行的，需要用到分数乘法的知识。具体算式如下：

9×（6÷9+2）＝24

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