Generally speaking, primary school mathematics is far from advanced mathematics. In fact, they are closely related not only in content, but also in thinking form. If we understand primary school mathematics from the perspective of higher mathematics, people will feel that primary school mathematics is extensive and profound; If the content of primary school mathematics is understood in the context of higher mathematics, in a sense, primary school mathematics is an important part of higher mathematics. If primary school mathematics teachers can teach primary school mathematics from the height of higher mathematics, it will play a very positive role in primary school students' learning and understanding of mathematical concepts. So I need it.