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排列、组合是学习概略论和数理统计等数学知识的基础,它们在生产生活实际以及各个学科领域中有着广泛的应用。其中,加法原理、乘法原理是排列、组合的基础,这部分内容的问题处理方法灵活多变,何时该用加法原理,何时该用乘法原理,容易搞错,难以取舍。准确理解、应用两个基本原理分析和解决一些简单的问题,帮助学生正确分清“分类”与“分步”的区别,训练学生的逻辑思维,提高学生分析问题的能力有着重要作用。
Arrangement, combination is to learn the basic theory of mathematical statistics and mathematical statistics, they are in production and practical life and various disciplines has a wide range of applications. Among them, the principle of addition, multiplication principle is the basis for the arrangement, combination, this part of the content of the flexible approach to deal with problems, when the addition principle, when the principle of multiplication, easy to make mistakes, it is difficult to choose. Accurately understand and apply two basic principles to analyze and solve some simple problems to help students correctly distinguish the difference between “classification ” and “step by step ”, train students’ logical thinking and improve the ability of students to analyze problems plays an important role .