《数学课程标准》指出:“数学教学活动必须建立在学生的认识发展水平和已有的知识经验基础之上。教学时,教师应善于从学生的生活经验和已有的知识背景出发,为学生提供充分的数学实践活动和交流的机会,努力改变传统的单一学习方 The ”Mathematics Curriculum Standards“ states: ”The mathematics teaching activities must be based on the students’ level of cognitive development and the existing knowledge and experience. When teaching, teachers should be good at starting from the student’s life experience and the existing knowledge background. Students provide adequate opportunities for mathematics practice activities and exchanges in an effort to change the traditional single-learner