“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” (2018) The Oguaa Educator, 12, pp. 28–52. Available at: https://journal.ucc.edu.gh/index.php/oguaaeducator/article/view/503 (Accessed: 24 August 2026).