(365 + 124) + 108 = 597
(91 − 63) + 396 = 424
73 + (418 + 418) = 909
277 + (100 − 19) = 358
Вычисления:
(365 + 124) + 108 = 489 + 108 = 597
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}365\\ 124\end{array}}\\ \begin{array}{r}489\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}489\\ 108\end{array}}\\ \begin{array}{r}597\end{array}\end{array}$
(91 – 63) + 396 = 28 + 396 = 424
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}91\\ 63\end{array}}\\ \begin{array}{r}28\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}28\\ 396\end{array}}\\ \begin{array}{r}424\end{array}\end{array}$
73 + (418 + 418) = 73 + 836 = 909
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}418\\ 418\end{array}}\\ \begin{array}{r}836\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}73\\ 836\end{array}}\\ \begin{array}{r}909\end{array}\end{array}$
277 + (100 – 19) = 277 + 81 = 358
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}100\\ 19\end{array}}\\ \begin{array}{r}81\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}277\\ 81\end{array}}\\ \begin{array}{r}358\end{array}\end{array}$