AL QADAR, M.; FIRDAUS, M. Analysis of the Difficulties of Class VIII Students of Private Middle School PAB 1 Klumpang in Solving Story Problems Arithmetic Sequences and Series. EDUCTUM: Journal Research, [S. l.], v. 2, n. 1, p. 14–18, 2023. DOI: 10.56495/ejr.v2i1.288. Disponível em: https://jurnal.larisma.or.id/index.php/EJR/article/view/288. Acesso em: 2 aug. 2025.