METHODS OF TEACHING THE CONCEPT OF NUMERICAL EXPRESSION IN PRIMARY GRADES. Educator Insights: Journal of Teaching Theory and Practice, [S. l.], v. 1, n. 4, p. 438–444, 2025. Disponível em: https://brightmindpublishing.com/index.php/EI/article/view/614. Acesso em: 20 jan. 2026.