The way I often use in teaching is to describe a beautiful fairy tale or an event close to children's life. The problem to be solved is contained in this story or event. In fact, it is to set a situation for students to solve the math problems around them, and to strengthen the relationship between math and life. The new textbook has edited a large number of situational teaching contents. The pictures are exquisite, vivid and exquisite, which are very close to students' life.