分类思想是解题的一种常用思想方法,它有利于培养和发展学生思维的条理性、缜密性、灵活性,使学生学会完整地考虑问题、化整为零地解决问题.这类试题不仅考查学生的数学基本知识与方法,而且考查了学生思维品质的深刻性.然而从近几年的中考阅卷中发现学生在解此类问题时,考虑不 Classification idea is a commonly used method of thinking, which helps to develop and develop the rational, meticulous and flexible student thinking, so that students learn to consider the problem completely, to solve the problem. Examining the students basic knowledge of mathematics and methods, but also examines the profound nature of the thinking of students, but in recent years in the exam papers found that students in solving such problems, consider not