浅谈排列组合应用题教学

On the Teaching of Applied Problems of Permutations and Combinations

通过“换元”“试验”、“一题多解”等方法 ,解决“排列组合应用题”中何时使用加法原理、何时使用乘法原理、怎样进行分类。

By using the methods of 'substitution”,'experiment”,'many solutions to one problem”,this paper solves the applied problems of permutations and combinations,and also solves the difficult prblems such as when to use addition principle,when to use multiplication principle,and when and how to classify.