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.

3. Extract notes: You can extract them from books or from cards. Write down classical mathematical examples, important theorem formulas and their proof methods.

Reading notes need to know:

Reading notes refer to notes made during reading in order to record one's own reading experience or sort out the wonderful parts of the text. When reading, writing reading notes is a good way to train reading. The easiest way to take reading notes is to "extract".

Abstraction means reading a book or an article, picking up some good sentences and paragraphs and copying them in a notebook or card. The content of the extract should be determined according to your own needs. You can copy the teachings of leaders and tutors, the wise sayings of thinkers, writers and scientists, the brave words and proverbs of people and heroes, etc. You can also extract the words you are interested in.