mathmatics . . I don't learn very well. . . Exam 102, in class, the teacher always gives us papers to do, then explains them and listens to the questions carefully. I'm lazy and won't do it again. But what the teacher means is that we have to make several wrong questions in private. I think the most important thing is to look at your own situation and master the methods. As for the set of questions, follow the step-by-step process, buy targeted questions first, and then buy comprehensive ones. This is what the teacher said. Personally, I have never bought extra exercises. First, I am lazy. Second, there is no time to do it at all, so I still don't waste money. . . In a word, I think mastering the problem-solving methods and studying hard will not only have no effect, but also waste time. I come from Liaoning.