Đặt tính rồi tính: 13 + 5 29 – 6

$\begin{array}{l}+\underset{¯}{\begin{array}{l}13\\ 5\end{array}}\\ 18\\ \end{array}$                 $\begin{array}{l}-\underset{¯}{\begin{array}{l}29\\ 6\end{array}}\\ 23\end{array}$                 $\begin{array}{l}+\underset{¯}{\begin{array}{l}33\\ 4\end{array}}\\ 37\end{array}$                        $\begin{array}{l}-\underset{¯}{\begin{array}{l}57\\ 21\end{array}}\\ 36\end{array}$