1, it is because of carelessness that the topic that can be done is wrong; Then we should correct her bad habits.
2, or because I didn't understand the meaning of the question, I made a mistake: do more exercises to exercise her understanding ability.
3. Still can't do it at all; Listen carefully in class, review carefully after class (urged by parents), do more exercises, or ask a tutor.
4. It is still the wrong way to do the questions, so that it is too late to finish the questions: in the exam, if there are too many questions, you can choose multiple questions from simple to difficult, do the questions you can do first, and do the difficult and ambiguous questions last. There is no need to waste too much time on difficult questions, otherwise it will lead to some questions that could have got high marks and lose points because of lack of time.