I. H. . Che Hashim and I. Che Hashim, “My 4 in 1 Math Plate”, MARI, vol. 2, no. 3, pp. 260–264, Dec. 2021, Accessed: Jul. 18, 2024. [Online]. Available: https://publisher.uthm.edu.my/periodicals/index.php/mari/article/view/5126