Kusumawati A, Ishartiwi, Handoyo RR. Contextual Concrete Media for Improving Subtraction Skills in Elementary Students: Media Konkret Kontekstual untuk Pemahaman Operasi Pengurangan Siswa Sekolah Dasar. ijins [Internet]. 2025 Sep. 18 [cited 2025 Dec. 5];26(4):10.21070/ijins.v26i4.1730. Available from: https://ijins.umsida.ac.id/index.php/ijins/article/view/1730