A comparative study of the effect of the methods of decomposition and base complement addition on Ghanaian children’s perfomance on compound substraction: A comparative study of the effect of the methods of decomposition and base complement addition on Ghanaian children’s perfomance on compound substraction. TOE. 2018;12:28-52. Accessed August 24, 2026. https://journal.ucc.edu.gh/index.php/oguaaeducator/article/view/503