排列与组合在中学数学中是一段独特的内容,它需要学生具备较丰富的想像能力和较强的思考能力。因此,一般学生都感到比较难学。分析其主要原因有(1)排列与组合中的概念在理解、应用,以及处理问题的方法上,与过去学习的知识有所不同,开始学习很不习惯。(2)比较抽象,直观性不强。如以 a、b、c 三个字母全排列,有6种; Arrangement and combination of high school mathematics is a unique content, which requires students to have a wealth of imagination and strong ability to think. Therefore, most students feel more difficult to learn. Analysis of the main reasons are: (1) Arrangement and combination of the concept of understanding, application, and the way to deal with problems, different from the past knowledge of learning, very difficult to start learning. (2) more abstract, intuitive is not strong. Such as a, b, c three letters full arrangement, there are 6 kinds;