数学思维的建构是小学数学教学的重点,也是难点,如何让小学生建构抽象的思维模式,这是教师必须要思考的问题。笔者认为,对比是一种较为有效的思维建构模式。现笔者谈谈对比在课堂教学中的实际应用。一、在新授课中对比,构建数学概念小学阶段的概念教学是个难点。如何建立认知体系,必须要从直观入手,只有让学生接受形象之后,才能获得数学意义上的接收。对比教学弥补了概念教学的抽象性,能让学生分清混淆的概念,避免认 The construction of mathematical thinking is the focus of primary school mathematics teaching, but also difficult, how to enable primary school students to construct abstract thinking mode, which teachers must think about. The author believes that contrast is a more effective mode of thinking. Now I talk about the contrast in the classroom teaching practical application. First, contrast in the new lectures, the concept of building the concept of mathematics concept elementary school is a difficult task. How to establish a cognitive system, we must start from the intuitive, only to allow students to accept the image, to receive the mathematical sense of the reception. Comparative teaching makes up for the abstraction of concept teaching, allowing students to distinguish between the concept of confusion, to avoid recognition