SARI, Nilam; SARAGIH, Sahat; NAPITUPULU, E. Elvis. Design Research to Learn Mathematics: A Study on The Effect of Problem-Solving Ability on The Creative Attitude of Junior High School Students. Mathline : Jurnal Matematika dan Pendidikan Matematika, [S. l.], v. 11, n. 1, p. 143–156, 2026. DOI: 10.31943/mathline.v11i1.1101. Disponível em: https://mathline.unwir.ac.id/index.php/Mathline/article/view/1101. Acesso em: 17 mar. 2026.