First of all, what are mathematical calculation, function calculation, sequence calculation, geometric volume calculation and conic curve calculation, but addition, subtraction, multiplication and division are also counted. Maybe it's just an addition and subtraction

Secondly, why is it wrong? There are many reasons: the test questions are boring (nothing in mathematics is boring), the mood is irritable, the mood is too nervous during the exam, and the simplest so-called carelessness (in fact, it is inattention).

Finally, it is swelling. Personally, first of all, draft paper is very important. She didn't really draft for you. My habit is to fold the draft paper in half and then write the serial number on each question, which is similar to doing a big question, but it doesn't need to be so neat. Just look at it yourself (but it must be organized).

Secondly, be careful, don't think that it is true that you will get two or three points in the final score of the college entrance examination if you spend time on these abacus, but once you make mistakes in the front, it will be difficult to get points. Think of a question when you do it, not the whole article last night. Then, we must have a normal mind. This is not only in mathematical calculation, but also in other exams.

Murphy's law just shows that sometimes things you don't want to happen will still happen. When taking an exam or calculating, what you should think is: take an exam carefully, calculate carefully, and then work out this problem, instead of how many points I must take this time (these are the goals set before the exam, and the exam process is just normal).

Finally, it is your interest. To tell the truth, it is difficult to be interested in senior three, but to be interested in yourself, you have to try many things. For example, if you work out a conic curve, will you have a sense of accomplishment? Personally, I think conic section may be the most computationally intensive in a set of test papers, so I can practice it a little to improve my computing ability.