1, circled notes: When reading a book, you can draw lines or make various symbols in the key, difficult and wonderful places of the book at any time. Some intensive reading books can also be distinguished by different color stroke lines.

2. Comment notes: Comment notes should not only be extracted, but also write opinions and comments on these points, and write opinions or experiences on mathematical knowledge. You can also combine the main points of the full text in the form of summary and write down the main contents.

Extended data:

When reading a book or an article, you come across a wonderful part of the text or a good word or sentence and your own experience, and write it down anytime and anywhere.

Read with your eyes, mouth, heart and hands. This "hand to hand" is a reading note. After reading an article or a book, you should write reading notes according to different situations.

Writing reading notes is a necessary condition for deeply understanding and firmly mastering what you have learned, and it is also a necessary condition for accumulating learning materials for emergencies.