Wang Nai told Tu that the math course is very suitable for primary school students who want to learn math well and lay a good foundation in Olympic Mathematics. Mathematics is a very logical subject, so thinking is the core of mathematics learning, especially doing problems. If you don't insist on thinking, association, analogy and summary, it is only equivalent to endorsement. When doing problems, you should learn to use the knowledge points contained in the thinking questions, the similarities and differences between the questions, and the connections. By thinking about integrating knowledge points, you will gradually refine your thinking, and it will be much smoother to solve such problems in the future. Every time you think, you will deepen your impression and gradually form your own knowledge system.