Kara, Fatma, and Lutfi Incikabi. “Sixth Grade Students’ Skills of Using Multiple Representations in Addition and Subtraction Operations in Fractions”. International Electronic Journal of Elementary Education 10, no. 4 (April 2, 2018): 463–474. Accessed October 10, 2024. https://iejee.com/index.php/IEJEE/article/view/462.