SAVCHEVA, Zdravka. THE INFLUENCE OF MENTAL ARITHMETIC ON THE INTELLECTUAL ABILITIES OF PRIMARY SCHOOL STUDENTS. KNOWLEDGE - International Journal , [S. l.], v. 64, n. 2, p. 223–228, 2024. Disponível em: https://ojs.ikm.mk/index.php/kij/article/view/6804. Acesso em: 15 aug. 2026.