2. When it is necessary to analyze and study a practical problem from a quantitative point of view, people should establish a mathematical model by using mathematical symbols and languages on the basis of in-depth investigation, understanding of object information, making simplified assumptions and analyzing internal laws.
3. Mathematical modeling is to establish a mathematical model, and the process of establishing a mathematical model is the process of mathematical modeling. Mathematical modeling is a mathematical thinking method, and it is a powerful mathematical means to describe and solve practical problems by using mathematical language and methods through abstraction and simplification.