排列组合作为高中数学课本的一个独立分支,因为极具抽象性而成为“教”与“学”难点。有相当一部分题目教者很难用比较清晰简洁的语言讲给学生听,有的即使教者觉得讲清楚了,但是由于学生的认知水平,思维能力在一定程度上受到限制,还不太适应。从而导致学生对题目一知半解,甚至觉得 As an independent branch of high school mathematics textbooks, arrangement and combination become “difficulties” because of its abstractness and “teaching” and “learning.” A considerable part of the title is difficult to tell students in relatively clear and concise language, and even if the teacher feels it is clear, due to the students’ cognitive level, their ability to think is limited to a certain extent, and they are not well adapted. . As a result, students have little knowledge of the topic and even feel that