IRENIZA, Citra; SUBAYANI, Nataria Wahyuning. Analysis of Mathematics Learning Difficulties in Addition and Subtraction Material in Class II of SD Negeri 1 Ngumpul. Pedagogia : Jurnal Pendidikan, [S. l.], v. 13, n. 1, p. 106–119, 2023. DOI: 10.21070/pedagogia.v13i1.1644. Disponível em: https://pedagogia.umsida.ac.id/index.php/pedagogia/article/view/1644. Acesso em: 8 sep. 2025.