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As we all know, there are still many problems in the teaching of practical problems because of following the traditional teaching methods and coping with exams. For example, on the topic, give more examples and one method, sit in the right place, and solve the problem set rigidly. This hinders thinking training, intellectual development and the cultivation of students' ability to analyze and solve problems. Therefore, the teaching of practical problems should strive to broaden thinking, strengthen thinking training and develop thinking power.