$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}68\\ 29\end{array}}\\ \begin{array}{r}97\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}50\\ 16\end{array}}\\ \begin{array}{r}34\end{array}\end{array}$
Ответ: 8, 2; 5, 6.