PENGARUH LKPD BERBASIS PROBLEM BASED LEARNING BERMUATAN BUDAYA BATAK TERHADAP KEMAMPUAN BERPIKIR KRITIS MATEMATIS SISWA DI SMAN 1 AIR PUTIH. JSSR [Internet]. 2026 Jun. 6 [cited 2026 Jun. 7];9(3):3140-6. Available from: https://jurnal.goretanpena.com/index.php/JSSR/article/view/6378