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Hutajulu M, Sofiah AA, Rustella F, Syahpitri D, Putri ASR, Harianti A. Comparison of Student Learning Outcomes Using Class Action Research To Improve Mathematics Problem Solving Ability. Mathline [Internet]. 2023 May 29 [cited 2025 Mar. 10];8(2):533-44. Available from: https://mathline.unwir.ac.id/index.php/Mathline/article/view/374