If your computing ability is poor, you can only improve your computing ability by practicing more. When doing problems, you must not be lazy, just write ideas. You must work out the problem completely, first ensure the correct rate and then gradually improve the speed; Careless knowledge points can be recorded in a notebook and turned out from time to time. After a long time, if you encounter similar problems, you will think more reflexively for a while to avoid making mistakes.

I hope the above contents are helpful to you!