“分类讨论思想”是指在解决某一个问题时,无法用同一种方法去解决,而需要一个标准将问题划分为几个能用不同形式去解决的小问题,通过对这些小问题再加以逐一解决最终达到解决问题的目的。这是一种重要的数学思想,也是重要的解题策略,通过这种化整为零、积零为整的归纳方法提高学生的归纳总结能力,提升学生思维的概括性和条理性。 “Classified discussion of thinking ” refers to the solution of a problem, the same method can not be used to solve, and the need for a standard problem is divided into several small problems can be solved in different forms, through these small problems and then To solve one by one to eventually solve the problem. This is an important mathematical thought as well as an important strategy for solving problems. Through this kind of rectification, the method of inducing and summarizing students with zero and zero in one’s wholeness improves students ’summarization ability and enhances the generalization and coherence of students’ thinking.