608 + 343 = 951
37 + 213 = 250
1 000 − 803 = 197
801 − 399 = 402
Вычисления:
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}951\\ 608\end{array}}\\ \begin{array}{r}343\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}250\\ 37\end{array}}\\ \begin{array}{r}213\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}1000\\ 197\end{array}}\\ \begin{array}{r}803\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}801\\ 402\end{array}}\\ \begin{array}{r}399\end{array}\end{array}$