The Effectiveness of Realistic Mathematics Learning Based on Mandailing Culture with a Deep Learning Approach In Improving Logical Thinking Skills. Riemann: Research of Mathematics and Mathematics Education, [S. l.], v. 7, n. 2, p. 111–120, 2025. DOI: 10.38114/reimann.v7i2.105. Disponível em: http://journal.sanagustin.ac.id/index.php/reimann/article/view/105.. Acesso em: 18 apr. 2026.