同学们知道,分类讨论是数学中的重要思想方法,也是解决问题的常见策略.但是,在教学中发现,有些同学囿于分类讨论意识淡漠,对分类标准疏于把握,或对讨论过程简化不够,以至于在运用分类讨论审视问题时,常常出现一些不应有的失误.有感于此,本文就如何正确地运用分类讨论解决问题,给同学们提出三点建议,供参考.其一、树立分类思想在数学中,某些定义、性质、公式的本身就涉及到分门别类的问题,如实数a的绝对值 Students know that class discussion is an important method in mathematics and a common strategy for solving problems, however, some students find it indifferent to classification discussion, neglect classification criteria or not enough to simplify the discussion process , So that in the use of classification to discuss the problem of review, there are often some unworthy mistakes.In this sense, this article on how to correctly use the classified discussion to solve the problem, to the students put forward three suggestions for reference.First, Establish a classification idea In mathematics, some definitions, nature, formula itself involves different issues, such as the absolute value of the real number a