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  <div class="csl-entry">Maharani, Zulfa, Sakur, and Armis. “Improving Mathematical Problem-Solving Skills in Ratio through the Application of Problem-Based Learning”. <i>Jurnal Absis: Jurnal Pendidikan Matematika dan Matematika</i> 7, no. 2 (December 30, 2024): 234–244. Accessed January 12, 2025. http://journal.upp.ac.id/index.php/absis/article/view/2602.</div>
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