Robie B. Ellare, Douglas A. Salazar, and Ariel O. Ellare. 2026. “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 7 (1): 62-70. https://doi.org/10.47505/IJRSS.2026.1.6.