“Development of qr code-assisted learning materials to improve students’ numbers’ abilities on spldv material in class x of ma nurul huda bercak asri cerme bondowoso: pengembangan bahan ajar” (2025) Jurnal Mercumatika : Jurnal Penelitian Matematika dan Pendidikan Matematika, 8(1). doi:10.26486/jm.v8i1.4270.