排列组合应用题是高中数学教材中的一个比较复杂的部分。由于它的内容独特,自成体系,而且种类纷繁,题型多变,解题方法新颖别致;有些题目还条件隐晦,较难捉摸,兼之得数偏大,不易检验,所以这一课题历来是教学中的难点。学生在解某些排列组合应用题时,常因审题不仔细,考虑欠周密,例如忽视限定条件等原 Arranging and combining application questions is a more complex part of the high school mathematics textbooks. Because of its unique content, self-contained system, and its variety of types and types, the types of questions are varied, and the problem-solving methods are novel and unique; some topics are also concealed by conditions, are more elusive, and are often too large to test, so this topic has always been Difficulties in teaching. Students in the process of solving certain arrays and combinations of applications, often due to the lack of careful examination, consider the lack of attention, such as ignoring the limitations of the original