Application problem is to describe relevant facts in language or words, reflect a certain quantitative relationship, and solve unknown problems. Each application problem includes known conditions and problems. In the past, China's application problems usually required narrative to meet three requirements: no contradiction, that is, conditions and problems could not be contradictory; Completeness, that is, the condition must be sufficient to ensure that the value of the unknown quantity can be obtained from the condition; Independence, that is, several known conditions cannot be deduced from each other. Mathematics application problems in primary schools are usually divided into two categories: simple application problems that can be solved in one step only by addition, subtraction, multiplication and division; Complex application problems that need two or more operations to solve.

In primary school mathematics, the practical problems with quantitative relations are described in language or words, and the problems formed in this way are called application problems. Any application problem contains two parts. The first part is known conditions (conditions for short), and the second part is seeking problems (problems for short). The conditions and problems of application questions constitute the structure of application questions.

Application problems can be divided into general application problems and typical application problems.

An application problem with two or more operations without specific solving rules is called a general application problem. An application problem that has a special quantitative relationship and can be solved by specific steps and methods is called a typical application problem.

(Application problems in primary school are generally solved by arithmetic, and only a few are solved by equations and proportions; All application problems in junior high school should be solved by equation method)

I hope it can help you solve the problem.