Your method is wrong. The most important thing in mathematics is the way of thinking. In fact, many problems have fixed solutions. I don't know if you are a junior high school or a senior high school or a university. I suggest that you can calm down and ask the teacher what you don't understand, so that your mind will be broadened and everyone will be different. Don't always want to compare with others! So you are too nervous to play well. Try to appreciate the process, the result is not that important.