Application of the Problem Based Learning Model with the Assistance of Audio Visual Media in Improving Mathematics Learning on Whole Number Addition and Subtraction Material for Grade 3 Students of UPTD SDN 37 Barru. JISIP [Internet]. 2025 Jan. 1 [cited 2026 Oct. 11];9(1):87-93. Available from: https://ejournal.mandalanursa.org/index.php/JISIP/article/view/7899