TORANG SIREGAR; ARISMAN, Ahmad; ISKANDARSYAH; ARDIAN, Risky; ````HARAHAP, Awal. Research and Developing Mathematics Knowledge Child Development Perspectives, 2022. International Journal of Applied Research and Sustainable Sciences, [S. l.], v. 1, n. 1, p. 43–54, 2023. DOI: 10.59890/ijarss.v1i1.318. Disponível em: https://journal.multitechpublisher.com/index.php/ijarss/article/view/318. Acesso em: 7 jul. 2026.