I'm a science student, and now I'm a senior three. I once had the same problem as you, but my math scores were basically around 145. My experience is doing problems.

First of all, we must establish a basic value: small problems are more important than big problems. In the college entrance examination, a small question will get 5 points, which means that if you make two small questions wrong, one of the big questions will be done in vain, so you would rather not finish the last big question than make a small one wrong.

Secondly, we must seize the time: I imagine that in your situation, you must do a small problem quickly, and it may be finished in less than half an hour. But in order to be correct, we must relax the time and slow down the speed of making small questions. At first, you may not finish your paper, but it doesn't matter. Soon, your correct rate of small questions will come up, and then you can gradually speed up. Finally, it is best to solve minor problems within 30~40 minutes.

And the usual practice is also very important: don't think that you don't need to practice very simple basic questions. On the contrary, because the basic questions will not change in the college entrance examination, but the big questions are always innovative, so making more articles at ordinary times can improve the accuracy of the college entrance examination and increase the self-confidence in the college entrance examination. After all, the college entrance examination is also a psychological war. Moreover, it is best for small problems to reach the level of subconscious reaction, but we should also pay attention to the trap of thinking and not be rigid in thinking.

In short, practice more at ordinary times, and take the exam slowly and steadily. I believe you can overcome this bottleneck ~ Come on ~