1. Basic knowledge points: Primary school mathematics topics mainly involve basic mathematical concepts and operations, such as addition, subtraction, multiplication and division, fractions, decimals and geometric figures. These knowledge points are the basis for students to learn mathematics, and they are also the cornerstone of follow-up study.

2. Easy to understand: Primary school math problems usually describe the problem in simple language, so that students can quickly understand the meaning of the problem. The conditions and requirements in the topic are relatively clear, which is convenient for students to analyze and answer.

3. Strong practicality: Primary school mathematics topics are often closely linked with real life, so that students can feel the practicality of mathematics in the process of solving problems. For example, when shopping, calculate the total price, calculate the distance and time.

4. Cultivating thinking ability: The primary school mathematics topic focuses on cultivating students' thinking ability, such as observation, analysis, induction and reasoning. By solving different types of problems, we can train students' thinking ability and lay a foundation for future study.

5. Various forms: There are various forms of primary school mathematics topics, including multiple-choice questions, fill-in-the-blank questions, and solution questions. This will enable students to exercise their problem-solving ability in different types of questions and improve their interest in learning.

6. Gradually increase the difficulty: The difficulty of primary school math problems will gradually increase with the improvement of grades to meet the learning needs of students. At the same time, the setting of topics will also guide students to master higher-level mathematical knowledge and skills.

7. Pay attention to the training of basic skills: Primary school mathematics topics pay attention to the training of students' basic skills, such as calculation, drawing and proof. These basic skills are the basis for students to learn mathematics and the key to improve their problem-solving ability.

In short, primary school mathematics topics are basic, practical and diverse, aiming at cultivating students' basic mathematics knowledge and skills, stimulating students' interest in learning and laying a solid foundation for future study.