An Implementation of Problem Based Learning Model to Improve Mathematics Solving Problem Ability of the Students Class XI MIA SMA Negeri 4 Gorontalo Utara. Jurnal Mercumatika : Jurnal Penelitian Matematika dan Pendidikan Matematika, [S. l.], v. 6, n. 1, 2022. DOI: 10.26486/jm.v6i1.2126. Disponível em: https://ejurnal.mercubuana-yogya.ac.id/index.php/mercumatika/article/view/2126. Acesso em: 30 jun. 2026.