AYTMURATOVA, Sarbinaz. DEVELOPING MENTAL CALCULATION COMPETENCY IN PRIMARY SCHOOL STUDENTS: PROBLEMS AND PEDAGOGICAL APPROACHES . International Conference on Science, Education & Law, [S. l.], v. 2, n. 9, p. 20–23, 2026. Disponível em: https://uniconflix.com/index.php/ICSEL/article/view/5836. Acesso em: 9 sep. 2026.