In this case, don't panic at first, but calmly analyze what you don't understand, whether it's axioms or theorems or calculation errors. Judging from your score of 0, it is estimated that you have a poor mathematical foundation and do not understand definitions, axioms or theorems, which will lead to such an outcome. However, you should be confident, mathematics is actually quite simple, just a bunch of formulas. Understand the definition and logic, and you will naturally understand. Now that I have just entered the second day of junior high school, I have plenty of opportunities to read more textbooks, especially every concept, definition, theorem and formula. I must thoroughly understand and deduce the formula. Remember that textbooks are the last word, and don't rush to make extra-curricular books. After reading a section, I can do the exercises after class seriously. Remember that I said I should do it seriously, and in the meantime, I must not look at the answers to the questions I can't do. I should think more and broaden my mind. The most important thing in this process is to exercise your independent thinking ability. Only when you can think can you do the problem. This ability can never be taught by others.
It may be a little difficult at first, but as long as you keep doing this, you will find that your math scores will improve quickly. It's no use asking for a tutor. The most important thing is that you can think independently, not listen to others. So try not to look at the answers when you do the questions. The key is to see if you have any thoughts on this issue and whether your thoughts are correct.
Luckily, that's how I got here, and I slowly entered the hall of mathematics. Remember that you don't have to do extra-curricular problems, but you must read the textbook thoroughly. Textbooks are the essence of the essence ~ ~