5 * 8 + 58 = 98
64 − 6 * 4 = 40
81 : 9 + 81 = 90
75 − 5 : 5 = 74
24 : 3 * 2 = 16
24 : (3 * 2) = 4
Вычисления:
5 * 8 + 58 = 40 + 58 = 98
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}40\\ 58\end{array}}\\ \begin{array}{r}98\end{array}\end{array}$
64 − 6 * 4 = 64 − 24 = 40
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}64\\ 24\end{array}}\\ \begin{array}{r}40\end{array}\end{array}$
81 : 9 + 81 = 9 + 81 = 90
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}9\\ 81\end{array}}\\ \begin{array}{r}90\end{array}\end{array}$
75 − 5 : 5 = 75 − 1 = 74
24 : 3 * 2 = 8 * 2 = 16
24 : (3 * 2) = 24 : 6 = 4