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分类讨论的通俗说法是按照一定的标准把研究的对象分成几个部分或几种情况加以解决,分类讨论题横贯在初中数学教材的各章节中,且在近年中考中频频出现在开放性、探索性较强的压轴题中,可学生在这类试题上失分较多,究其原因,缺乏分类意识,缺少解分类讨论题的方法.现结合示例,谈谈分类讨论的成因、方法及注意事项.
The colloquial discussion discusses colloquialism in which the object of the study is divided into several parts or several situations according to certain criteria. Classification discussion questions traverse the various chapters of junior middle school mathematics textbooks, and in recent years, the examinations frequently appear in openness and exploration. In the final round of the problem, the students can lose more points on this type of test. The reasons are lacking in the sense of classification, and there is a lack of methods to solve the classification and discussion questions. Now, with examples, talk about the causes, methods, and notes of classified discussion. matter.