MAFTUNA SAGDATDINOVA. PRINCIPLES OF TEACHING PROBLEM SOLVING IN PRIMARY GRADE MATHEMATICS LESSONS BASED ON A COMPETENCY-BASED APPROACH. Ethiopian International Journal of Multidisciplinary Research, [S. l.], v. 12, n. 04, p. 570–572, 2025. Disponível em: https://www.eijmr.org/index.php/eijmr/article/view/2976. Acesso em: 16 jun. 2026.