“有效的数学学习活动不能单纯地依赖模仿与记录,动手实践、自主探索与合作交流是学生学习数学的重要方式.”新课标明确指出:数学教学应从学生的生活经验和已有的知识背景出发,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,帮助他们在自主探究和合作交流的过程中真正理解和掌握基本的数学知识与技能、数学思想和方法,获得广泛的数学活动经验.因而在小学数 Effective mathematics learning activities can not simply rely on imitation and recording, hands-on practice, independent exploration and cooperation and exchange is an important way for students to learn mathematics. “” The new curriculum clearly states: mathematics teaching should be from the students’ life experience and the existing Based on the knowledge background, teachers should stimulate students’ enthusiasm for learning and provide students with opportunities to fully engage in mathematical activities to help them truly understand and master basic mathematical knowledge and skills, mathematical ideas and methods in the process of independent inquiry and cooperation and exchange, and obtain Extensive experience in math activities. Thus in elementary school