Peningkatan Hasil Belajar Operasi Penjumlahan Sifat Komutatif melalui Media Flashcard. JPPI [Internet]. 2025 Jun. 6 [cited 2026 Jul. 21];2(1):38-47. Available from: https://ejournal.intelektualedu.com/index.php/JPPI/article/view/62