SAVCHEVA, Zdravka. TECHNIQUES FOR APPLYING MENTAL CALCULATION IN LEARNING NON-TABULAR MULTIPLICATION IN PRIMARY EDUCATION. KNOWLEDGE - International Journal , [S. l.], v. 68, n. 2, p. 289–295, 2025. Disponível em: https://ojs.ikm.mk/index.php/kij/article/view/7138. Acesso em: 15 aug. 2026.