You should put all the questions in your wrong book. Generally speaking, my experience is that I don't look at the right topic and put the wrong one in. The effect is very good. In addition, explain how you made mistakes at that time, such as careless mistakes. Your thoughts are not in place. When you do the second question, you can recall it and do it again if you make a mistake. This will definitely improve your math level. If time is tight, you can directly cut and paste the wrong questions you have done and cut the answers by the way. Doing a certain amount of questions like this will definitely improve your study. Some gunmen and champions almost always do this wrong.