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《高考说明》中对排列组合这部分要求:(1)理解分类加法计数原理和分步乘法计数原理。(2)了解排列、组合的概念,会用排列数公式、组合数公式解决简单的实际问题。高考卷当中,关于排列组合的应用题最多出现一道选择题或者是填空题,所以教师在课堂教学中引入少,学生在这章节所花的时间就少,学生感觉难度大。学习和总结此类问题的解题原则,掌握其规律,对培养学生
“College Entrance Examination” in the arrangement of this part of the combination of requirements: (1) understand the principle of classification plus counting and step-by-step multiplication counting principle. (2) Understand the concept of permutation and combination, and solve the simple and practical problems by using permutation formula and combination formula. Among the college entrance examination papers, there are at most one multiple choice question or a blank question on the application of the permutations and combinations, so the teachers introduce less into the classroom teaching and the students spend less time in this chapter, which makes the students feel more difficult. Learn and summarize the principle of solving such problems, master their laws, and train students