Shanghai edition. According to the Family Education Network, the Shanghai version is used in the mathematics textbooks for primary schools in Shanghai. Shanghai Minhang District Central Primary School was founded on 1928. In its 80-year history, taking the opportunity of curriculum reform and quality education, we adhered to the school-running purpose of "providing quality education services for every student's lifelong happiness and creating unlimited possibilities for every student's independent development" and actively explored and practiced the education and teaching reform.