Students' mistakes show that there are loopholes in their knowledge. Teachers can guide students to record their mistakes in the wrong book. By this way, they can find out which knowledge points they have defects in. For example, in arithmetic progression's study, if students make mistakes because they ignore the particularity of the first n items and the Sn structure, it shows that students' mastery of arithmetic progression's formula is not ideal. At this point, teachers can let students use the wrong problem set to sort out their mistakes. Through this method, students can quickly find the loopholes in their knowledge, and then improve their mathematics learning level.

2. Use the wrong set of questions to find the rules and find the key points.

In mathematics learning, students can find their next review focus by formulating the learning method of wrong problem set. By watching the wrong set of questions, students can clearly understand their weak knowledge points and review them accordingly. In this way, students don't have to formulate sea tactics, thus improving learning efficiency.

3. Wrong problem sets can cultivate students' mathematical thinking.

In the process of learning, there are many reasons for students to make mistakes, some of which are related to their incomplete understanding of knowledge points; Some mistakes are because students are not careful in reading the wrong questions; There are also mistakes because students' mathematical thinking analysis is wrong. Then, in mathematics learning, by applying the wrong problem set to it, we can cultivate students' mathematical thinking and analytical ability, understand the requirements in the problem, and help students correct their bad habits in learning.