That depends on the difficulty of your math. If you have a good foundation in mathematics and know some basic mathematical ideas (such as classified discussion ideas), you should be able to teach yourself a lot. If the math foundation is not good, it will be more difficult to learn by yourself. In addition, even if the self-learning ability is strong, you will encounter problems that you can't solve. If not, ask the teacher more. The advantage of self-study is that it is not easy to forget what you have learned, but it is easy for teachers to forget what they have learned once they teach; The disadvantage of self-study is that if you don't use the most correct ideas and methods, you will take some detours, but these can be solved by asking the teacher.