tính 390 - 155

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{390}\\{155}\end{array}} \\\,\,\,\,235\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{762}\\{\,\,\,18}\end{array}} \\\,\,\,\,780\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{728}\\{651}\end{array}} \\\,\,\,\,\,\,\,77\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{716}\\{\,\,\,66}\end{array}} \\\,\,\,\,782\end{array}\)