数量关系是数学模型的重要内容之一,模型思想的建立是学生体会和理解数学与外部世界联系的基本途径。学生对数量关系的把握和运用,能够比较清楚地反映出他们运用知识解决数学问题的能力,在遇到实际生活中的数学问题时,这种分析数量关系的能力显得尤为重要。《数学课程标准》在课程内容中增加了对数量关系教学的要求:“在实际生活中,了解常见的数量关系,如‘总价=单价×数量、路程=速度×时间’等,并能解决简单的实际问题。”这里改 The relationship between quantity and quantity is one of the important contents of mathematical model. The establishment of model thinking is the basic way for students to understand and understand the connection between mathematics and the outside world. The grasping and applying of the relationship between quantity and quantity of students can more clearly reflect their ability of using knowledge to solve mathematical problems. When faced with the mathematical problems in real life, the ability to analyze the relationship between quantity and quantity is particularly important. The standard of mathematics curriculum adds the requirement for teaching of quantitative relationship in the course content: “In real life, understand the common quantitative relationship, such as” total price = unit price × number, distance = speed × time “and so on Solve simple practical problems. ”Change here