264 + x, если x = 36, 250, 736.
Если x = 36, то 264 + 36 = 300.
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}264\\ 36\end{array}}\\ \begin{array}{r}300\end{array}\end{array}$
Если x = 250, то 264 + 250 = 514.
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}264\\ 250\end{array}}\\ \begin{array}{r}514\end{array}\end{array}$
Если x = 736, то 264 + 736 = 1 000.
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}264\\ 736\end{array}}\\ \begin{array}{r}1000\end{array}\end{array}$