数与计算历来是小学数学教学的重要基础,是重点的启蒙认知教育。从数学角度讲,是学生客观认识世界的基本工具。在教学的过程中也是培养学生抽象、概括能力的起点,它是经过抽象到具体、一般到特殊的过程,重在教学中重视对学生的启蒙诱导,让学生对概念有一个全新的认知、发展和统一的全过程。 Number and calculation has always been an important foundation for primary school mathematics teaching, is the focus of enlightenment cognitive education. From a mathematical point of view, students are the basic tools to understand the world objectively. In the course of teaching, it is also the starting point of cultivating students’ abstraction and general abilities. It is the process of abstracting from the concrete to the special to the general, emphasizing the enlightenment and inducement of the students in the teaching, giving the students a new cognition of the concepts, The whole process of development and reunification.