It takes 2-3 months to learn the content of the third grade mathematics in People's Education Edition. The content of third-grade mathematics in People's Education Press includes numbers and formulas, functions, plane vectors, analytic geometry, etc., and there are about 20 chapters. According to different learning progress and learning ability, it will take different time to complete the math content of grade three. It takes 1-2 hours to study every day, and it takes about 2-3 months to complete the math content of Grade Three.