81 : 9 + 26 * 6 − 144 : 72 = 163
4 * 18 − 9 − 32 : 8 + 111 * 8 = 947
(25 * 3 : 15) * (48 * 2 : 16) = 30
(12 * 7 : 42) * (16 * 6 : 24) = 8
Вычисления:
81 : 9 + 26 * 6 − 144 : 72 = 163
1)
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}81\\ \phantom{0}\underset{¯}{81}\\ \phantom{00}0\end{array}& \begin{array}{l}\overline{)9}\\ \overline{\overline{)9}}\end{array}\end{array}$
2)

3)

4)
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}9\\ 156\end{array}}\\ \begin{array}{r}165\end{array}\end{array}$
5)
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}165\\ 2\end{array}}\\ \begin{array}{r}163\end{array}\end{array}$
4 * 18 − 9 − 32 : 8 + 111 * 8 = 947
1)

2)
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}32\\ \phantom{0}\underset{¯}{32}\\ \phantom{00}0\end{array}& \begin{array}{l}\overline{)8}\\ \overline{\overline{)4}}\end{array}\end{array}$
3)

4)
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}72\\ 9\end{array}}\\ \begin{array}{r}63\end{array}\end{array}$
5)
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}63\\ 4\end{array}}\\ \begin{array}{r}59\end{array}\end{array}$
6)
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}59\\ 888\end{array}}\\ \begin{array}{r}947\end{array}\end{array}$
(25 * 3 : 15) * (48 * 2 : 16) = 30
1)

2)

3)

4)

5) 5 * 6 = 30
(12 * 7 : 42) * (16 * 6 : 24) = 8
1)

2)

3)

4)

5) 2 * 4 = 8