The motif of primary school mathematics refers to the basic problem, that is, the problem that needs to master certain basic mathematical knowledge and skills to be successfully completed. These motifs are usually used to cultivate students' basic skills and thinking ability, and are also the basis for more complex topics in the future. There are 36 themes in primary school mathematics, and the common ones are:

1, legal issues.

2. Cuboids and cubes.

3. Fractional application questions.

4. Travel problems.