A preliminary understanding of the content of the third-level book of Jiangsu Education Edition belongs to the practical teaching of the concept of basic numbers. Teachers think that the content of this course is simple and the teaching is easy to become a mere formality. They are content to quote concepts with a few examples and help to judge and choose simple operations. Because they are used to simplicity, they can often accurately grasp the basic meaning of axis graphics, not to mention creatively applying what they have learned.