(48,80\0,2)+(50,2*0,05)

$${\frac{{\mathtt{48.8}}}{{\mathtt{0.2}}}}{\mathtt{\,\small\textbf+\,}}{\mathtt{50.2}}{\mathtt{\,\times\,}}{\mathtt{0.05}} = {\mathtt{244}}{\mathtt{\,\small\textbf+\,}}{\mathtt{2.51}} = {\mathtt{246.51}}$$

.