Hobri H, Widyasari NK, Murtikusuma RP. Analysis of high school students’ problem solving in solving jumping task problems on arithmetic sequences and series. Math Didactic [Internet]. 15 Mei 2020 [dikutip 6 Juli 2025];6(2):124-41. Tersedia pada: https://jurnal.stkipbjm.ac.id/index.php/math/article/view/952