ABU BAKAR, K.; MOHAMED, S.; YUNUS, F.; KARIM, A. A. Use of Multiple Representations in Understanding Addition: The Case of Pre-school Children. International Journal of Learning, Teaching and Educational Research, [S. l.], v. 19, n. 2, p. 292–304, 2020. Disponível em: https://ijlter.myres.net/index.php/ijlter/article/view/476. Acesso em: 18 apr. 2026.