思维分正向思维和逆向思维,然而人们思考问题时惯于正向思维,忽视逆向思维的应用,致使思维面狭窄.事实上逆向思维和正向思维二者处于同等地位,而且有些问题若能善于从逆向思维的角度去思考,会使思维变得流畅,问题迎刃而解.现就引发学生逆向思维的几种因素进行分析和归纳,旨在拓宽学生分析和解决问题的渠道,以此培养学生思维的广阔性、深刻性和灵活性.1由数、式运算的可逆性引发的逆向思维是在对已知数、式子的结构特征(可逆性)观察 Thinking is divided into positive thinking and negative thinking, but people think of the problem is used to positive thinking, ignore the application of reverse thinking, resulting in narrow thinking .In fact, reverse thinking and positive thinking both in the same position, and if some problems can be good Thinking from the perspective of reverse thinking, will make the thinking become fluid, the problem solved.A few factors that cause students to reverse thinking is analyzed and summarized in order to broaden the channels for students to analyze and solve problems in order to develop students’ thinking Broadness, profoundness, and flexibility.1 The reverse thinking triggered by the reversibility of numbers and expressions is based on the observation of structural features (reversibility) of known numbers and expressions