ROBIE B. ELLARE; DOUGLAS A. SALAZAR; ARIEL O. ELLARE. Activity Sheets on the Application of the Four Fundamental Operations of Integers for Grade 7 Learners Using Open Approach. International Journal of Research in Social Science and Humanities (IJRSS) ISSN:2582-6220, DOI: 10.47505/IJRSS, [S. l.], v. 7, n. 1, p. 62–70, 2026. DOI: 10.47505/IJRSS.2026.1.6. Disponível em: https://ijrss.org/index.php/ijrss/article/view/807. Acesso em: 8 jan. 2026.