21世纪是一个全球化、网络化、信息化的知识经济时代。时代要求教师更新教育观念、调整教学、改革教学模式。而教学模式转变的核心是注重培养学生的创造精神与实践能力。数学是抽象性、逻辑性很强的一门学科。小学生的思维正处于由具体形象思维为主向抽象逻辑思维为主的过渡阶段。小学数学必须在数学知识的抽象性和学生思维的形象性 The 21st century is a era of globalization of knowledge, internet and information economy. The times require teachers to update their educational concepts, adjust teaching and reform their teaching modes. The core of the teaching model is to focus on training students to create the spirit and practical ability. Mathematics is an abstract, highly logical discipline. The thinking of primary school students is in the transition stage from the concrete image thinking to the abstract logical thinking. Elementary mathematics must be in the mathematical knowledge of the abstract and the image of the students thinking