In my opinion, doing the problem is definitely necessary and really indispensable. However, you should do something, do something different, do something about the same topic, and master the methods skillfully. If you encounter the same problem again, you can skip it after a general look.
You should learn to sum up the problems you did wrong and learn how to do them.
There are not many questions, but you should learn the methods and proficiency of solving problems.
Since you are interested in learning mathematics, study hard. Our former math teacher has a saying on his lips every day: Mathematics plays around the earth!
Oh, come on ~