Husna F. Improving the Ability to Understand Mathematical Concepts Through Problem-Based Learning (PBL) and Manipulatives in Class V Students of MIN 2 Pariaman City. jodel [Internet]. 2025 May 31 [cited 2025 Nov. 6];3(2):291-5. Available from: https://jodel.or.id/index.php/jodel/article/view/135