Agustrianai, F. “The Use of Hot Potatoes As Learning Media In Algebra Operations Material to Increase Activities and Learning Outcomes of Seventh Grade Students in SMP Al Hidayah Karangduren 2018/2019 Academic Year”. Jurnal Axioma : Jurnal Matematika Dan Pembelajaran, vol. 4, no. 2, July 2019, pp. 139-50, doi:10.36835/axi.v4i2.461.