Yasa, A. D., Suastika, I. K., & Ningtyas, N. V. W. (2020). Development of Learning Media Pansirbongpas for the Operation of Fraction Numbers for Grade 4 Elementary School. Jurnal Ilmiah Sekolah Dasar, 4(3), 515–523. https://doi.org/10.23887/jisd.v4i3.27620