Senior teachers can't say that senior students count me in. Like you, let me talk about the slow calculation speed first. I used to calculate slowly, but the teacher gave me 1 oral arithmetic practice, 50 questions a day, and I calculated faster. Doing math problems is careless, and many problems are wrong. This is my problem now. Math pays attention to 1 success, because you can't find any problems when checking, so I'm doing the problem of 1 now, and watching it five times will take an average of 4 to 5 seconds more for each problem, but the correct rate has come up, which is worth it. If it is a big exam, you can only do something refreshing a few minutes before the exam, such as drinking coffee. Because of this, you will enter a highly concentrated state and the efficiency of reading questions will be greatly improved. Generally, there are no mistakes. This is the method I used in the senior high school entrance examination. Now I get an A in math every time. I hope it works for you. I wish you success in the senior high school entrance examination.