2. Addition and subtraction within 10,000 (2).

3. Quadrilateral.

4. Division with remainder.

5. Hours, minutes and seconds.

6. Multiply multiple numbers by one number.

7. Preliminary understanding of scores.

8. Possibility.

9 mathematical wide angle (simple arrangement and combination questions).

Primary school mathematics:

Through textbooks, children are taught a series of knowledge about numbers, four operations, formulas for calculating figures and lengths, unit conversion and so on, laying a good mathematical foundation for junior high school and daily life calculation.

Frieden Noel, a Dutch educator, said: "Mathematics comes from reality and must be rooted in reality and applied to reality." Indeed, modern mathematics requires us to observe the world from a mathematical perspective and explain the world in mathematical language. Judging from the mathematics learning psychology of primary school students, the learning process of students is not a passive absorption process, but a reconstruction process based on existing knowledge and experience. Therefore, learning while doing and learning while playing will make children learn more actively. From our educational goal, while imparting knowledge, we should pay more attention to cultivating students' comprehensive ability of observation, analysis and application.

Knowledge points: number, rewriting (omitting) score of number, decimal and percentage score, comparison of decimal and percentage, understanding of natural number of number, formula and equation, proportion and proportion diagram of measurement unit, spatial statistics and possibility, integer.