Concept:Subtract the total pocket money given to the children from the mother's initial amount.Explanation:Each child receives GH₵1.50.There are 3 children.Total pocket money given =3×1.50=GH₵4.50.Mother's initial amount =GH₵5.00.Amount left =5.00−4.50=GH₵0.50.Answer:GH₵0.50 (Option D).