tính 325 + 80

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{325}\\{\,\,\,80}\end{array}} \\\,\,\,\,405\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{807}\\{456}\end{array}} \\\,\,\,\,351\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{380}\\{452}\end{array}} \\\,\,\,\,832\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{395}\\{157}\end{array}} \\\,\,\,238\end{array}\)