Description of Math Learning Difficulties in Mental Retardation Students in Completing the Original Number Calculation Operation. Journal of Curriculum and Pedagogic Studies (JCPS), [S. l.], v. 1, n. 2, p. 63–71, 2022. DOI: 10.30631/jcps.v1i2.1634. Disponível em: https://e-journal.lp2m.uinjambi.ac.id/ojp/index.php/jcps/article/view/1634. Acesso em: 23 nov. 2025.