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Yotina Ndruru. Upaya Meningkatkan Hasil Belajar Matematika Siswa melalui Penerapan Model Problem Based Learning di Kelas VII SMP Negeri 1 Lolomatua. JERKIN [Internet]. 2024 Feb. 5 [cited 2026 Apr. 19];2(3):252-6. Available from: https://jerkin.org/index.php/jerkin/article/view/260