It is an acknowledged fact that "there are far more girls than boys entering key high schools".
I don't think you need to compete with boys everywhere. If you care too much, it is easy to go wrong. Unstable mentality is also a taboo in the senior high school entrance examination.
Since you say that you are the key and you are good at math, you should adjust your mentality in time! Although math may not be as good as boys, there are always several courses that are far better than others, right?
And most importantly, to be honest, your future can't be compared with the boys in your current class, and you will meet more excellent people.
To say the least, the total score is king, and a partial genius can never go to a famous domestic university in the normal way.
As for how to improve your math scores, if it is really because the questions are difficult and the scores are low, then don't worry too much. In fact, the most important thing in the final sprint stage is consolidation, because the exam is difficult, and the difficult questions will never occupy the majority. It is taboo to blindly pursue high difficulty.