数学解题的一个基本思想就是设法将问题化归为熟悉的或已经解决的问题,这在解决排列组合问题中也不例外.当学生积累了一定的常规解法后,需要强化“转化”这一思想方法,以便于探索解题思路、寻求巧妙解法.本文介绍对应转化思想在解题时的应用.以下举例说明.例1　从1,2,3,…,10中 One of the basic ideas of solving problems in mathematics is to try to classify problems into familiar or solved problems. This is no exception in solving the problems of permutation and combination. When students have accumulated certain conventional solutions, they need to strengthen the “transformation”. Ways of thinking, in order to explore problem-solving ideas, seek clever solutions. This article describes the application of corresponding transformation ideas in solving problems. The following examples illustrate. Example 1 From 1,2,3,...,10