九年义务教育全日制小学数学教学大纲提出，数学教学要遵循学生的认知规律，重视学生获取知识的思维过程。而加强教具，学具的操作正是实现这一要求的具体措施。实际上，操作作为教学活动中最有效的辅助手段，无论是在形成空间观念中还是在形成法则中都起着十分重要的作用... Nine-year compulsory education full-time elementary school mathematics syllabus suggested that mathematics teaching should follow the cognitive rules of students, emphasis on students acquire knowledge of the thinking process. The strengthening of teaching aids, learning the operation is to achieve this requirement specific measures. In fact, as the most effective auxiliary of teaching activities, operation plays a very important role both in forming the concept of space and in forming the law.