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数学概念是反映现实世界的空间形式和数量关系的本质属性的思维形式,因其高度的概括性、抽象性、严密性和逻辑性,一直是初中数学教学的重难点之一。《义务教育数学课程标准》强调:让学生亲身经历将实际问题抽象成数学模型并进行解释与应用的过程。初中数学的每一个概念都是一个数学模型,要让学生亲身经历将实际问题抽象成数学模型并进行解释与应用的过程,首先要为学生提供一个具体的问题情境,学生通过感知概
Mathematical concepts are the forms of thinking that reflect the essential attributes of the spatial form and quantitative relations in the real world. Because of their high degree of generalization, abstraction, rigor and logic, mathematical concepts have always been one of the most difficult points in mathematics teaching in junior high schools. The standard of compulsory education mathematics curriculum emphasizes: let students experience the process of abstraction of practical problems into mathematical models and their interpretation and application. Each concept of junior high school mathematics is a mathematical model, to allow students to experience the practical problems of abstraction into a mathematical model and explain and apply the process, first of all to provide students with a specific problem situation, through the perception of students