新课程标准指出,有效的数学学习活动不能单纯地依赖模仿与记忆,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。实践操作是一种特殊的认知活动。一方面,操作活动是手与眼协同活动,另一方面,操作活动又是手与脑密切联系。这两方面的结合,便构成了操作活动区别于其他认识活动的特性。小学生动手操作,总是在眼、手、脑共同感知时展开了思维,他们在操作 The new curriculum standard points out that effective mathematics learning activities can not rely solely on imitation and memory, hands-on practice, independent exploration and cooperation and exchange are important ways for students to learn mathematics. Practice is a special kind of cognitive activity. On the one hand, the operating activities are hand-eye synergistic activities, on the other hand, operational activities are the hands and the brain are closely linked. The combination of these two aspects constitutes the distinguishing feature of operational activities from other cognitive activities. Pupils are hands-on, always in the eyes, hands, brain feel together when thinking, they are operating