数学新课标明确指出:“数学课程的基本出发点是促进学生全面、持续、和谐地发展。它不仅要考虑数学自身的特点,更应遵循学生学习数学的心理规律,强调从学生已有的生活经验出发,让学生亲身经历将实际问题抽象成数学模型并进行解释与应用的过程,进而使学生获得对数学理解的 The new mathematics curriculum clearly states: ”The basic starting point of mathematics curriculum is to promote students ’comprehensive, sustained and harmonious development. It not only needs to consider the characteristics of mathematics itself, but also should follow the psychological rules of students’ learning mathematics, Based on the experience of life, students can experience the process of abstracting the practical problems into the mathematical model and interpreting and applying them, so as to make the students gain the understanding of mathematics