纵观历年高考数学试题,排列与组合问题 时难时易,它常以现实生活、社会热点为载体, 且常考常新,考生的得分率也不是很高．究其 原因主要有以下两个方面:一是审题不够清 楚,一知半解;二是方法选择不当,张冠李戴． 其中第二个原因是造成失分的最主要原因． 以下笔者就排列与组合问题中经常出现 的误区例举一二,供参考指正． When we look at the mathematics questions in college entrance examinations over the years, it is difficult to arrange and assemble problems. It is often based on real life and social hot spots. It often tests new ones, and the scores of candidates are not very high. The reasons are mainly the following two aspects: First, the issue is not clear enough, a little knowledge; second method is improper choice, Zhang Guan Li Dai. The second reason is the most important cause of losing points. The following authors often give examples of misunderstandings in the arrangement and combination problems for reference and correction.