Read the textbook first. Everything in the textbook is the most basic. Read through the textbook before reading the whole book. Mathematics needs to lay a good foundation. Make the knowledge in the textbook clear first. Don't watch the simple exercises after class. You can consolidate what you learned at that time. When you have read the textbook almost, start reading the whole book. Remember to look back at the textbook when doing the problem, find out what you don't understand, understand it, and sum up while doing the problem, so that you can get in touch with your own problem-solving skills, which is always very useful in the exam. Come on! ~