ANNISA, Fitri. Development of Manipulative: Understanding the Concept of Integer Addition and Subtraction. The Eurasia Proceedings of Educational and Social Sciences, [S. l.], v. 38, p. 29–39, 2024. DOI: 10.55549/epess.844. Disponível em: https://epess.net/index.php/epess/article/view/844. Acesso em: 24 apr. 2025.