Hia I, Harefa A. Analysis of Difficulties in Understanding Mathematical Concepts In Class VIII Students of SMP Negeri 2 Hiliduho in the 2022/2023 Academic Year. edumaspul [Internet]. 1Oct.2023 [cited 18May2024];7(2):5730-4. Available from: https://ummaspul.e-journal.id/maspuljr/article/view/7425