排列组合在高中数学教学中是难点,尤其是排列组合应用题有很多同学没有思路,要解决这一问题,首先应掌握好基础知识,包括加法原理与乘法原理、排列、排列数公式、组合、组合数公式和组合数的若干性质,在掌握了基础知识的前提下才能灵活应用,解决一些实际应用题,下面通过分析归类讨论解法。 1 无限制条件的简单排列组合应用题,这种题的解法步骤为: Arrangement combination in high school mathematics teaching is difficult, especially the arrangement of combination of many students have no ideas, to solve this problem, we must first grasp the basic knowledge, including the addition principle and multiplication principle, arrangement, arrange the number of formulas, combinations, Several combinations of the number of formulas and the number of combinations of the nature, mastered the basics under the premise of flexible application, to solve some practical problems, the following discussion by analyzing the solution. 1 unlimited arrangement of simple combinations of application questions, the solution of this problem steps are: