PENERAPAN MODEL PROBLEM BASED LEARNING UNTUK MENINGKATKAN BERPIKIR KRITIS MATEMATIS SISWA SMK. J. Song. Math [Internet]. 2024 Jun. 14 [cited 2026 Sep. 19];6(2):97-105. Available from: https://jurnal.unikastpaulus.ac.id/index.php/JSM/article/view/1730