54306 : 6 = 9051
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}54306\\ \phantom{0}\underset{¯}{54}\\ \phantom{00}\underset{¯}{\phantom{0}}3\\ \phantom{000}\underset{¯}{0}\\ \phantom{00}\underset{¯}{\phantom{0}}30\\ \phantom{000}\underset{¯}{30}\\ \phantom{0000}\underset{¯}{\phantom{0}}6\\ \phantom{00000}\underset{¯}{6}\\ \phantom{00000}0\end{array}& \begin{array}{l}\overline{)6}\\ \overline{\overline{)9051}}\end{array}\end{array}$
 
93025 : 5 = 18605
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}93025\\ \phantom{0}\underset{¯}{5}\\ \underset{¯}{\phantom{0}}43\\ \phantom{0}\underset{¯}{40}\\ \phantom{0}\underset{¯}{\phantom{0}}30\\ \phantom{00}\underset{¯}{30}\\ \phantom{000}\underset{¯}{\phantom{0}}2\\ \phantom{0000}\underset{¯}{0}\\ \phantom{000}\underset{¯}{\phantom{0}}25\\ \phantom{0000}\underset{¯}{25}\\ \phantom{00000}0\end{array}& \begin{array}{l}\overline{)5}\\ \overline{\overline{)18605}}\end{array}\end{array}$
 
35109 : 3 = 11703
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}35109\\ \phantom{0}\underset{¯}{3}\\ \phantom{0}\underset{¯}{\phantom{0}}5\\ \phantom{00}\underset{¯}{3}\\ \phantom{0}\underset{¯}{\phantom{0}}21\\ \phantom{00}\underset{¯}{21}\\ \phantom{000}\underset{¯}{\phantom{0}}0\\ \phantom{0000}\underset{¯}{0}\\ \phantom{0000}\underset{¯}{\phantom{0}}9\\ \phantom{00000}\underset{¯}{9}\\ \phantom{00000}0\end{array}& \begin{array}{l}\overline{)3}\\ \overline{\overline{)11703}}\end{array}\end{array}$
 
7 * (3002 − 786 + 414) = 7 * (2216 + 414) = 7 * 2630 = 18410
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}3002\\ 786\end{array}}\\ \begin{array}{r}2216\end{array}\end{array}$
 
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}2216\\ 414\end{array}}\\ \begin{array}{r}2630\end{array}\end{array}$
 
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}2630\\ 7\end{array}}\\ 18410\end{array}$
 
9101 − (470 − 309) * 8 = 9101 − 161 * 8 = 9101 − 1288 = 7813
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}470\\ 309\end{array}}\\ \begin{array}{r}161\end{array}\end{array}$
 
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}161\\ 8\end{array}}\\ 1288\end{array}$
 
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}9101\\ 1288\end{array}}\\ \begin{array}{r}7813\end{array}\end{array}$
 
8204 − (360 + 840) : 4 = 8204 − 1200 : 4 = 8204 − 300 = 7904
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}360\\ 840\end{array}}\\ \begin{array}{r}1200\end{array}\end{array}$
 
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}1200\\ \phantom{0}\underset{¯}{12}\\ \phantom{00}\underset{¯}{\phantom{0}}0\\ \phantom{000}\underset{¯}{0}\\ \phantom{000}\underset{¯}{\phantom{0}}0\\ \phantom{0000}\underset{¯}{0}\\ \phantom{0000}0\end{array}& \begin{array}{l}\overline{)4}\\ \overline{\overline{)300}}\end{array}\end{array}$
 
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}8204\\ 300\end{array}}\\ \begin{array}{r}7904\end{array}\end{array}$