1. Pay attention to the textbook, first make sure that the content of the textbook is thoroughly understood, then do the topic of basic knowledge, and then brush the exercises.

2. It is important to understand the connotation and logic of mathematical definitions and formulas, then memorize them, and finally consolidate the memory by doing problems. Practice makes perfect. 3. Improve the ability of induction and summary, weave the knowledge points into a net, and learn to draw inferences.