468 + 296 = 764
800 − 139 = 661
602 − 583 = 19
394 + 394 = 788
308 + 96 = 404
308 − 96 = 212
Вычисления:
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}468\\ 296\end{array}}\\ \begin{array}{r}764\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}800\\ 139\end{array}}\\ \begin{array}{r}661\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}602\\ 583\end{array}}\\ \begin{array}{r}19\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}394\\ 394\end{array}}\\ \begin{array}{r}788\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}308\\ 96\end{array}}\\ \begin{array}{r}404\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}308\\ 96\end{array}}\\ \begin{array}{r}212\end{array}\end{array}$