49 : (54 − 47) = 7
(56 : 7) + 92 = 100
6 * (24 : 3) = 48
7 : (35 : 5) = 1
(37 + 19) : 7 = 8
7 * (100 − 91) = 63
Вычисления:
49 : (54 − 47) = 49 : 7 = 7
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}54\\ 47\end{array}}\\ \begin{array}{r}7\end{array}\end{array}$
(56 : 7) + 92 = 8 + 92 = 100
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}8\\ 92\end{array}}\\ \begin{array}{r}100\end{array}\end{array}$
6 * (24 : 3) = 6 * 8 = 48
7 : (35 : 5) = 7 : 7 = 1
(37 + 19) : 7 = 56 : 7 = 8
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}37\\ 19\end{array}}\\ \begin{array}{r}56\end{array}\end{array}$
7 * (100 − 91) = 7 * 9 = 63
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}100\\ 91\end{array}}\\ \begin{array}{r}9\end{array}\end{array}$