“1+2+3=?”是一个简单得不能再简单的数学习题,说起这个问题,还得从1990年谈起,在一次教研活动中,很多教师谈到:现在的不少尖子学生喜欢钻牛角尖,所以我突发奇想,在高中数学竞赛选拔赛的试卷中(填空题第三小题)放上了这个简单的数学习题,测试结果大出人们的意料,23人参试(毕业后大多考上重点 “1+2+3=?” is a simple number problem that can’t be simple any more. Talking about this problem, we have to talk about it from 1990. In a teaching and research activity, many teachers talked about: Now many top students I like to get into the corners, so I whimsy, in the high school math competition trial papers (fill in the third question) put this simple number of questions, the test results out of people’s expectations, 23 people participated in the test (mostly after graduation test Focus on