“数的认识”是小学数学的重要组成部分。教学中要关注数的意义、数的表示、数与数的关系、数的应用。特别是数的意义,也就是数的概念的建立。借助“数线模型”理解数的意义,建立数感是一种重要的手段。小学生在中低年级主要以形象思维为主,抽象思维为辅。“数”本身是抽象的,学生在最初形成数概念的过程中,依赖 “Number of knowledge ” is an important part of elementary mathematics. Teaching should pay attention to the significance of number, the number of said, the relationship between the number and the number of applications. In particular, the significance of numbers, that is, the establishment of several concepts. With the “number line model” to understand the meaning of numbers, the establishment of number sense is an important means. Primary and middle school students mainly in the image of thinking, abstract thinking supplemented. “Number ” is abstract in itself, and students rely on the initial concept of number formation