(1) Straight into the central theme;

(2) Click Select to add a branch on the left;

(3) Click the "+"on the left and right to add a branch;

(4) Write the topics of mathematics units in each subject;

(5) Click "+"in each branch to add subordinate branches, and complete the production of the knowledge mind map of the unit;

(6) Save and export the picture.

According to the content of each unit, it can be briefly summarized. You can draw it as a big tree and write the contents in each crown. You can also draw a summary, classify it with braces, and write the contents of each unit in it.