$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}27\\ 12\end{array}}\\ \begin{array}{r}39\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}33\\ 54\end{array}}\\ \begin{array}{r}87\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}25\\ 24\end{array}}\\ \begin{array}{r}49\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}44\\ 44\end{array}}\\ \begin{array}{r}88\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}41\\ 18\end{array}}\\ \begin{array}{r}59\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}52\\ 27\end{array}}\\ \begin{array}{r}79\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}15\\ 71\end{array}}\\ \begin{array}{r}86\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}66\\ 23\end{array}}\\ \begin{array}{r}89\end{array}\end{array}$