METHODOLOGY OF USING ELEMENTS OF MENTAL ARITHMETIC IN THE FORMATION OF MATHEMATICAL CONCEPTS IN ELEMENTARY SCHOOL STUDENTS. International Journal of Advance Scientific Research, [S. l.], v. 3, n. 12, p. 269–274, 2023. DOI: 10.37547/ijasr-03-12-46. Disponível em: https://sciencebring.com/index.php/ijasr/article/view/590. Acesso em: 11 dec. 2025.