Mathematical models for calculating primary numbers: Proposed a teaching criteria for fundamental education. Research, Society and Development, [S. l.], v. 10, n. 5, p. e35910515171, 2021. DOI: 10.33448/rsd-v10i5.15171. Disponível em: https://rsdjournal.org/rsd/article/view/15171. Acesso em: 6 dec. 2025.