Условие:

Увеличь: 48 на 12, 56 на 30, 92 на 8, 44 на 44.

48 + 12 = 60
56 + 30 = 86
92 + 8 = 100
44 + 44 = 88
Вычисления:
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}48\\ 12\end{array}}\\ \begin{array}{r}60\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}56\\ 30\end{array}}\\ \begin{array}{r}86\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}92\\ 8\end{array}}\\ \begin{array}{r}100\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}44\\ 44\end{array}}\\ \begin{array}{r}88\end{array}\end{array}$