(45 + 15) * 3 = 180
(45 + 15) * 5 = 300
(45 + 15) * 6 = 360
(45 + 15) * 10 = 600
Вычисления:
(45 + 15) * 3 = 60 * 3 = 6 * 10 * 3 = (6 * 3) * 10 = 18 * 10 = 180
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}45\\ 15\end{array}}\\ \begin{array}{r}60\end{array}\end{array}$
(45 + 15) * 5 = 60 * 5 = 6 * 10 * 5 = (6 * 5) * 10 = 30 * 10 = 300
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}45\\ 15\end{array}}\\ \begin{array}{r}60\end{array}\end{array}$
(45 + 15) * 6 = 60 * 6 = 6 * 10 * 6 = (6 * 6) * 10 = 36 * 10 = 360
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}45\\ 15\end{array}}\\ \begin{array}{r}60\end{array}\end{array}$
(45 + 15) * 10 = 60 * 10 = 600
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}45\\ 15\end{array}}\\ \begin{array}{r}60\end{array}\end{array}$