You must make it clear that there is a big difference in mathematics between primary school and junior high school, so don't think about the past. First of all, you must concentrate on class and make sure that every knowledge point understands the teacher's analysis of each example. If you do this, your exam results can be guaranteed. Then, you must start to extend to the outside world, try to do difficult problems and cultivate active thinking, but since it is a difficult problem, it must be very annoying to do it. Especially for girls who are naturally weak in rational thinking but absolutely insist on it. When you begin to understand, that feeling is wonderful, and then gradually you will find the charm of mathematics. But don't be too persistent. If you really can't solve it, ask the teacher until you understand it thoroughly. In addition, we should sum up the problems we have learned regularly and get a certain law of solving problems (not necessarily standardized). After the teacher solves the problem, you can know everything about it, even you can.

As for the quality of Chinese, you can't draw a conclusion by virtue of the exam. It is important to remember, then understand and summarize. Reading more literary works is effective, as well as ancient prose, which is also very troublesome. I suggest reading more ancient Chinese, even browsing casually, which will help your sense of ancient Chinese. Go to nature more when you are free, even in the park. When you are in a good mood, practice writing at will.

I don't expect you to do the above things from the bottom of my heart. I just want to help you and sincerely wish you progress in your study.