What should I do if I accidentally misread the topic or miscalculated it?

Learning mathematics is not only learning arithmetic skills, but also training your carefulness and patience.

Some people use "careless mistakes" to forgive themselves. I don't know that "carelessness" itself is a mistake and unforgivable.

Only by realizing this, you can not only learn knowledge, but also hone your computing ability (including doing anything) in your study. You know, if things in the world want to succeed, it is not enough to have methods, but also to have insight into nuances and perseverance.

In my opinion, I learned not only math and physics at school, but also how to know, analyze and solve problems.

As you get older, you will understand this sentence more and more.