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Ginting, I. B.; Sembiring, R. K. .; Silaban, P. J.; Ambarwati, N. F.; Sitepu, A. PENGARUH MODEL PEMBELAJARAN PROBLEM BASED LEARNING BERBANTUAN WORDWALL UNTUK MENINGKATKAN KEMAMPUAN PEMECAHAN MASALAH MATEMATIKA SISWA KELAS IV SD NEGERI 040444 KABANJAHE. AQUINAS 2024, 7, 186-195.