The best tutorial books are textbooks. I used to be poor at math and bought a lot of materials, but I think textbooks can really help me. The college entrance examination is really a headache, and everyone is crazy about it. You find out the previous math textbooks, remember the concepts and knowledge points carefully, and finish the exercises in each chapter. What we can do now is the patch method. You can find some questions to do first and see how to do it. If you don't understand that knowledge point, you can add a knowledge point. Mathematics is very flexible, and there are many knowledge points nested in those big questions. Before you know what you want to do, you must read the theme carefully and read the meaning of the theme, although