Putri Utami DS, Setiyawati E. Students’ Mathematical Problem Solving Ability in Elementary School: Kemapuan Pemecahan Masalah Matematis Siswa di Sekolah Dasar. acopen [Internet]. 2022 Dec. 31 [cited 2025 Sep. 4];7:10.21070/acopen.7.2022.4064. Available from: https://acopen.umsida.ac.id/index.php/acopen/article/view/4064