Ireniza C, Subayani NW. Analysis of Mathematics Learning Difficulties in Addition and Subtraction Material in Class II of SD Negeri 1 Ngumpul. pedagogia [Internet]. 2023Dec.30 [cited 2024Nov.21];13(1):106 -119. Available from: https://pedagogia.umsida.ac.id/index.php/pedagogia/article/view/1644