Balkist, Pujia Siti, Hamidah Suryani Lukman, and Nita Andriani. 2022. “DEVELOPMENT OF SOCIAL ARITHMETIC TEACHING MATERIALS TO IMPROVE UNDERSTANDING OF MATHEMATICAL CONCEPTS OF JUNIOR HIGH SCHOOL STUDENTS”. De Fermat : Jurnal Pendidikan Matematika 5 (2). https://doi.org/10.36277/defermat.v5i2.84.