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在初中数学教学中,经常涉及分类讨论思想。分类讨论是一种重要的数学思想,对发展学生逻辑思维能力、提高学生数学素质有很大的作用。要培养学生学会合理分类讨论。比如在一元二次方程的解法中,就会出现分类讨论。一、关于一元二次方程几种解法中的分类讨论(一)直接开平方法直接开平方法针对的是最简单的一类一元二次方程方
In junior high school mathematics teaching, often involved in the classification of thinking. Category discussion is an important mathematical thought, which plays a great role in developing students ’logical thinking ability and improving students’ mathematical quality. Students should be trained to learn reasonable classification. For example, in the quadratic equation solution, there will be classification discussion. A discussion on the classification of several solutions of the quadratic equation (a) The direct Kaiping method The method of direct Kaiping is aimed at the simplest class of quadratic quadratic equations