Common mistakes in multiplication and division of natural numbers among first-year students primary. Journal of the College of Basic Education, [S. l.], n. 49, p. 413–444, 2023. DOI: 10.35950/cbej.vi49.9799. Disponível em: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/9799.. Acesso em: 6 jul. 2024.