《数学课程标准》明确指出:“数学课程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,进而使学生获得数学理解的同时,在思维能力、情感态度与价值 ”Mathematical Curriculum Standards“ clearly states: ”Mathematics courses should not only consider the characteristics of mathematics itself, but also should follow the psychological rules of students to learn mathematics. Emphasis should be on starting from the students’ existing life experiences so that students can experience the practical problems abstracted into mathematics Model and explain and apply the process, so that students get mathematical understanding at the same time, thinking skills, emotional attitudes and values