在解决数学问题时,通过正确分类,我们可以使复杂问题简单化,解题思路清晰化,解答过程严谨化.分类思想以及分类讨论的方法在初中数学中占有极其重要的地位.综观近几年中考数学试卷,涉及分类讨论的试题比比皆是,这类试题不仅考查数学基本知识与基本技能,而且考查思维的深刻性、复杂性和创造性.由于 In solving mathematical problems, through correct classification, we can simplify complex problems, clear problem-solving ideas, the process of answering questions.Classification thinking and the method of category discussion occupy an extremely important position in junior high school mathematics.In a word, Examination papers in the exam, subjects involved in the classification discussed abound, these questions not only examine the basic knowledge of mathematics and basic skills, but also to examine the profound, complex and creative thinking.