分类讨论是高考常考查的数学思想方法,学会分类讨论有利于培养和提高学生的逻辑思维能力,必须认真掌握.有些分类讨论题,如果我们巧选解题方法,可以避免分类讨论,简化解题过程,这就是说,我们在解答分类讨论题时,既要切实掌握分类讨论的方法,又要善于绕开分类讨论,那么我们怎样避 Classification discussion is the mathematics thinking method often used in college entrance examinations. Learning to classify and discuss is helpful for cultivating and improving students’ logical thinking ability. It must be carefully mastered. Some classified discussion questions can avoid classification discussion and simplify problem solving if we choose the problem solving method skillfully. The process, that is to say, when we answer the classification discussion questions, we must not only effectively grasp the methods of classified discussion, but also be good at bypassing the classification discussions.