Hurst, Chris, and Ray Huntley. “Distributivity, Partitioning, and the Multiplication Algorithm”. JRAMathEdu (Journal of Research and Advances in Mathematics Education) 5, no. 3 (July 16, 2020): 231–246. Accessed January 1, 2026. https://journals2.ums.ac.id/jramathedu/article/view/9314.