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“UPAYA MENINGKATKAN HASIL BELAJAR PESERTA DIDIK KELAS 1 SD NEGERI KARANGREJO 02 SEMARANG MATERI PENJUMLAHAN DAN PENGURANGAN MELALUI MODEL PEMBELAJARAN PROBLEM BASED LEARNING BERBANTUAN KATAK MELOMPAT”, psnppg, vol. 2, no. 1, pp. 75–88, Jan. 2025, Accessed: Aug. 11, 2026. Available: https://conference.upgris.ac.id/index.php/psnppg/article/view/6360