Bunga Lestari and Lailatun Nur Kamalia Siregar 2026. The Effect of the Use of Multiplication Bar Media on the Understanding of Mathematics Multiplication Concepts for Grade IV Students of SDS IT Madani Southeast Aceh. BASICA. 6, 2 (Jul. 2026), 1–14. DOI:https://doi.org/10.37680/basica.v6i2.9670.