1, the basic knowledge of quick calculation: For first-year students, calculation is the first problem that students encounter when they study. If we can find some rules in the seemingly chaotic formula and simplify it, then students will definitely enhance their confidence and interest in learning mathematics. In addition, calculation and quick calculation are the basis of learning various follow-up questions. To learn mathematics well, you must first pass the calculation.

2. Know and learn to count various basic figures: square, cuboid, circle and cube are the most common figures in primary school learning. Through systematic guidance, first-year students can calculate the number of various basic graphics; Enable students to establish orderly thinking and lay the foundation for establishing thinking mode.

3. Learn simple enumeration method: enumeration method is really difficult for first-year students. In China's mathematics textbook, this difficult problem is introduced in a more intuitive way of counting, and the complicated and abstract problems are visualized for children to understand. The training of enumeration method focuses on orderly thinking mode, and visualizing abstract problems at the beginning of learning can better guide students to think positively and establish their own thinking mode.

4. Basic knowledge of number theory, such as parity, inequality, phase, etc. The problem of number theory is a key point in the follow-up study, and what we are going to learn this semester, such as parity, inequality, phase, etc., is undoubtedly the basis for future study. Here, we divide the problems of number theory into various types and explain them one by one, which makes the study of China numbers more systematic.