“MENINGATKAN KEMAMPUAN PEMECAHAN MASALAH MATEMATIS MELALUI MODEL PROBLEM BASED LEARNING: IMPROVING MATHEMATICAL PROBLEM SOLVING ABILITY THROUGH THE PROBLEM BASED LEARNING MODEL”. Abacus: Academic Journal of Mathematics Learning and Education 1, no. 1 (December 15, 2020): 25–37. Accessed May 4, 2024. https://jurnal.upg.ac.id/index.php/abacus/article/view/383.