NUGROHO , Satria Adi; JAILANI, Jailani. The Effectiveness of Concrete Representational Abstract Approach (CRA) Approach and Problem Solving Approach on Mathematical Representation Ability at Elementary School . KnE Social Sciences, [S. l.], v. 3, n. 17, p. 27–36, 2019. DOI: 10.18502/kss.v3i17.4620. Disponível em: https://knepublishing.com/index.php/KnE-Social/article/view/4620. Acesso em: 11 jul. 2025.