2. Do less exercise. Mathematics is time-consuming, so you must be patient. I must write the topics in the review materials well, and don't look for other materials to engage in sea tactics, which will have no effect. I'd better find a better quality material to be serious and try to solve every topic.
3, when doing the problem, you must use your own brain, not half-hearted. If you want to learn math well, you must think carefully and analyze how each step comes, until you can understand it.
Don't forget to ask for help when studying. Don't stare all the time when you encounter problems or analyze them. If you don't have a clue after more than 10 minutes, give up quickly and ask teachers and classmates for help at school.
I hope you can devote yourself to mathematics. You can't remember anything else when you study math. Think more, practice more and ask more questions in mathematics. I hope you can succeed!