《数学课程标准》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习数学的重要方式。”现代教学论强调:要让学生动手做数学,而不是用耳朵听数学。动手操作作为小学数学课堂教学中一种重要的教学活动形式,对于培养学生动手操作能力、提高课堂教学效率具有十分重要的意义。一、研究教材,科学预设 Mathematical Curriculum Standard states: “Effective mathematics learning activities can not rely solely on imitation and memory, hands-on practice, independent exploration and cooperation and exchange is an important way to learn mathematics.” Modern teaching theory emphasizes: let students do mathematics Instead of listening to math with your ears. As an important form of teaching activities in the classroom teaching of primary school, hands-on operation is very important for cultivating students’ ability of hands-on operation and improving the efficiency of classroom teaching. First, research textbooks, scientific default