1, open the drawing software XMind.

2. The first unit mainly talks about numbers and algebra, and we draw it as the central theme.

3. Numbers and algebra are mainly divided into addition and subtraction within 10,000 and multiple recognition. These three points are drawn as secondary titles.

4. Addition and subtraction within 10,000 mainly refers to the addition and subtraction between two digits and three digits, and the addition and subtraction of more than three digits. Their respective knowledge points are supplemented as the topics of Grade Three.

5. Finally, sort out the small knowledge points contained in each knowledge point, and then sort out the supplementary mind map.

Primary school mathematics is to teach children a series of knowledge about number, four operations, the calculation formula of figure and length, unit conversion and so on through textbooks, which lays a good mathematical foundation for junior high school and daily life calculation.