Amir Mahmud Hasibuan, Noven Christoper Butarbutar, and Niko Alriadi Sinaga. “CHALLENGES OF ELEMENTARY SCHOOL STUDENTS IN UNDERSTANDING ADDITION SENTENCES AND TEACHER STRATEGIES: A LITERATURE REVIEW”. Jurnal Merah Putih Sekolah Dasar 2, no. 3 (January 30, 2025): 228–236. Accessed January 29, 2026. https://jurnal.unimed.ac.id/2012/index.php/jmpsd/article/view/71037.