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《数学课程标准》指出:“在体现作为知识与技能的数学结果的同时,重视学生已有的经验,使学生体验从实际背景中抽象出数学问题,构建数学模型。”数学模型,一般地说是针对或参照某种事物的特征或数量关系,采用形式化的数学符号和语言,概括或近似表述出来的一种数学结构。构建数学模型的过程一般包括:从现实生活或具体情境中抽象出数学问题,用数学符号和语言表示问题的数量关系和变化规律,求出结果,并验证结果。两步计算的实际问题的数学建模对于学生的后续学习具有深远意
The Mathematics Curriculum Standard states: “While embodying mathematics as a result of knowledge and skills, we emphasize the experience of the students and make the students experience abstracting the mathematical problems from the actual background and constructing mathematical models.” Mathematical Models, General To say or refer to a certain kind of thing or the number of relations, the use of formal mathematical symbols and language, generalized or approximate expression of a mathematical structure. The process of building a mathematical model generally includes: abstraction of mathematical problems from real life or specific situations, mathematical relations between numbers and expressions of language problems and the changing rules, to find the results and verify the results. Mathematical modeling of the practical problem of two-step calculation has far-reaching implications for the student’s subsequent learning