数学概念的形成是以学生的直接经验为基础,用归纳的方法抽取出一类事物的共同属性,从而达到对数学概念的理解.学生要构造自己理解的数学概念,其实质是一种思想上的飞跃,而这种飞跃的过程,就是从具体到抽象、从感性到理性的过程.为了顺利地实现这种思想上的飞跃,教师要让学生在足够韵感性材料的基础上,借助于对比、分析、综合、抽象与概括等一系列逻 The formation of mathematical concepts is based on the direct experience of students, by inductive method to extract the common attributes of a class of things, so as to achieve the understanding of mathematical concepts.Students should construct their own understanding of mathematical concepts, the essence is a kind of ideological Leap, and this leap in the process, that is, from the specific to the abstract, from the emotional to the rational process.In order to successfully achieve this leap of thought, teachers should let students on the basis of sufficient rhyme material, by means of contrast , Analysis, synthesis, abstraction and generalization of a series of logic