《数学课程标准》(实验稿)指出:数学教学活动必须建立在学生的认知发展水平和已有知识经验基础之上。教师应激发学生的学习积极性,向学生提供充分从事数学活动的机会,帮助他们在自主探索和合作交流的过程中真正理解和掌握基本的数学知识和技能、数学思想和方法,获得广泛的数学活动经验。因 Mathematical Curriculum Standards (experimental draft) pointed out: Mathematics teaching activities must be based on the level of cognitive development of students and the basis of existing knowledge and experience. Teachers should stimulate their enthusiasm for learning and provide students with the opportunity to fully engage in math activities so that they can truly understand and master basic math knowledge and skills, mathematical ideas and methods and acquire extensive math activities during their own exploration and cooperation. experience. because