\(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{54}\\{27}\end{array}}\\\hline{\,\,\,27}\end{array}\) \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{72}\\{36}\end{array}}\\\hline{\,\,\,\,36}\end{array}\)
\(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{50}\\{25}\end{array}}\\\hline{\,\,\,\,25}\end{array}\) \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{95}\\{48}\end{array}}\\\hline{\,\,\,47}\end{array}\)