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 [Internet]. 2018 June 1 [cited 2026 Aug. 24];12:28-52. Available from: https://journal.ucc.edu.gh/index.php/oguaaeducator/article/view/503