数学教学的根本目的是培养学生能够独立思考问题,分析问题和解决问题的能力.为了达到此目的,仅仅依赖课本知识,局限个别题型,满足单一思维是难以达到要求的,这样可能会是“只见树木,不见森林”.而变式教学可以让学生在“变”的过程中感悟知识真谛,扩充思维结构,增强对知识相互? The fundamental purpose of mathematics teaching is to cultivate students ability to think independently, analyze problems and solve problems.In order to achieve this goal, relying on textbook knowledge alone, limited to individual questions, to meet the single thinking is difficult to meet the requirements, it may be “ Only see the trees, not see the forest. ”And variant teaching allows students to“ change ”in the process of perception of the true meaning of knowledge, to expand the thinking structure, and enhance mutual knowledge?