Improvement of Fifth Grade Students’ Mathematical Reasoning and Learning Activity with the Implementation of Problem Solving Learning Model. JOURNAL OF TEACHING AND LEARNING IN ELEMENTARY EDUCATION (JTLEE), [S. l.], v. 3, n. 2, p. 132–141, 2020. DOI: 10.33578/. Disponível em: https://jtlee.ejournal.unri.ac.id/index.php/JTLEE/article/view/137. Acesso em: 5 nov. 2025.