Due to the limited knowledge and understanding ability of the first-grade primary school students, they can't read, analyze and understand the meaning of the problem well in the process of doing mathematical application problems, let alone how to solve the problem, so it is really difficult for students and parents to grasp this problem. According to the summary of the application problems in the first grade of primary school, it is found that there are three main types of problems. First, there is often a word "* * *" about parts and whole classes; Second, the word "ratio" often appears on the issue of ratio; Third, regarding the surplus class, the word "surplus" often appears. In view of the above types, one-to-one mode is often used to solve and analyze, but the effect is often not very good because of the limited inductive ability of primary school students. In order to better solve the math application problems in the first grade of primary school, it should be a good choice to use matrix method.

The main advantages of solving problems by matrix method are as follows:

1, cultivate the habit of examining questions and improve the ability to understand the meaning of questions;

2. Improve the refining and grasping of key words in application questions;

3. Cultivate multidimensional interpretation and way of thinking;

4. Improve the comprehensive answering ability of all kinds of application questions.