Sutarman Borean, Sinambela, M. H., Marlince Anggelina Siep, Risnauli Y. Nainggolan, & Tresya Palungan. (2025). The effectiveness of the ’matahari’ method in improving basic arithmetic skills of junior high school students . Journal of Honai Math, 8(1), 129–142. https://doi.org/10.30862/jhm.v8i1.765