By brushing questions, we can constantly strengthen the application of mathematical knowledge, which is generally mastered and understood in doing problems.

However, we should pay attention to the methods in the process of brushing the questions, and we can't copy them mechanically. When we do the questions, we need to master the methods used in the stem.

If you want to learn mathematics well, you should not only master the basic knowledge points, but also learn various problem-solving methods and skills. The most important thing in learning is to learn the methods and skills in the questions.

Therefore, it is useful to brush the questions, but we should pay attention to the method of brushing the questions.

I hope it helps you!