新课标要求: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同时。在思维能力、情感态度与价值观等多方面得到进步和发展.实际应用问题一方面可以使学生从实际问题中发现数学信息,另一方面,能创造性地运用数学知识解决含有数学信息的问题. New Curriculum Requirements: Students should experience the process of abstracting actual problems into mathematical models and interpreting and applying them, so that students can gain understanding of mathematics at the same time. In the aspects of thinking ability, emotional attitude and values, etc., progress and development are achieved. On the one hand, practical application problems can enable students to find mathematical information from practical problems, and on the other hand, they can creatively use mathematical knowledge to solve problems involving mathematical information.