有一个两位数x,在x前面添上数字1,组成一个三位数m,在x的后面添上数字1,组成一个三位数n,若n比m大306,那么x=?谢~

来源：学生作业帮助网编辑：作业帮时间：2024/07/17 22:00:02

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