Yasa, A.D., Suastika, I.K. and 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 (Sep. 2020), 515–523. DOI:https://doi.org/10.23887/jisd.v4i3.27620.