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. ijrss [Internet]. 2026 Jan. 4 [cited 2026 Jan. 8];7(1):62-70. Available from: https://ijrss.org/index.php/ijrss/article/view/807