SUTARMAN BOREAN; SINAMBELA, Mindo Hotmaida; MARLINCE ANGGELINA SIEP; RISNAULI Y. NAINGGOLAN; TRESYA PALUNGAN. The effectiveness of the ’matahari’ method in improving basic arithmetic skills of junior high school students . Journal of Honai Math, [S. l.], v. 8, n. 1, p. 129–142, 2025. DOI: 10.30862/jhm.v8i1.765. Disponível em: https://journalfkipunipa.org/index.php/jhm/article/view/765. Acesso em: 16 apr. 2026.