Pramudiani P, Herman T, Turmudi, Dolk M, Doorman M. How does a missing part become important for primary school students in understanding fractions?. j. math. educ. [Internet]. 2022 Dec. 11 [cited 2024 Nov. 22];13(4):565-86. Available from: http://jme.ejournal.unsri.ac.id/index.php/jme/article/view/254