UPAYA PENINGKATAN HASIL BELAJAR MATEMATIKA MATERI BILANGAN BULAT MELALUI MODEL PEMBLEJARAN PROBLEM BASED LEARNING SISWA KELAS VI B SDN PANDEANLAMPER 03. psnppg. 2023;1(2):2858-2865. Accessed August 11, 2026. https://conference.upgris.ac.id/index.php/psnppg/article/view/5446