Balkist, P. S., Lukman, H. S., & Andriani, N. (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), 154–159. https://doi.org/10.36277/defermat.v5i2.84