吴正宪老师曾说过:孩子们的手尖上跳跃着的是智慧,任何高明的教师都不能代替孩子的操作,孩子们只有亲自参加活动,在动手操作中不断积累感性材料,才能有效的促进孩子们的思维。《义务教育数学课程标准》中也明确指出:“有效的数学教学学习活动不能单纯依赖模仿与记忆,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。”动手操作是学生获得知识的重要途径,学生通过动手操作 Teacher Wu Zhengxian once said that the children’s hands are jumping on the wisdom of the tip, no clever teacher can not replace the child’s operation, the children only to participate in activities in their hands-on operation continue to accumulate perceptual material in order to effectively promote children Their thinking. The Standard of Compulsory Education Curriculum also clearly states: “Effective mathematics teaching and learning activities can not rely solely on imitation and memory. Hands-on practice, self-exploration and cooperation and exchange are important ways for students to learn mathematics.” " Knowledge is an important way for students to operate by hand