Judging from what you said, your math scores should be about the same as before. Because you are careless and have uncertainty in doing the problem, there is little difference between 98 points and 100 points, which should belong to the normal category. You also do your usual homework, which means that you rarely or never do extracurricular problems. That is to say, you can do it, and there is no training to improve it. According to your situation, it can be this level, and the concept is well grasped. However, I dare say that it is often difficult for you to get full marks on big questions. If you really want to improve your grades. The suggestions are as follows:

1. Do more extracurricular exercises. In this respect, you can ask the teacher which exercise book to choose according to your situation and ask the teacher to recommend it. Do at least one problem every day.

2, in the process of doing the problem, you should think for yourself, but now you can't start, then ask your classmates or teachers. This process of embarrassing yourself is the process of mastering knowledge and boosting yourself. When you finish the problem, you will really know where you are, and you will also master the skills of doing it.

3, insist on doing math problems every day. This can be done after other homework is finished, so that you can finish your homework and improve yourself.

4. Pay attention to summarizing the topics, and some good topics should be memorized; You can even solve this problem in several ways. Then choose the best answer as the standard, so as to master it skillfully. We should pay attention to summarizing the methods of doing problems that are convenient for us to master, so that we can sum up the knowledge in the textbook. When you can summarize the contents of a book on a piece of paper, you will learn.

I think you still have great potential and have the basic knowledge of solving problems, but your problem-solving skills are not good; With a little effort, you will achieve something. Wish you success!