b = 329
(218 + b) − 416 = (218 + 329) − 416 = 547 − 416 = 131

Вычисления:
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}218\\ 329\end{array}}\\ \begin{array}{r}\mathrm{547 }\end{array}\end{array}$
 
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}547\\ 416\end{array}}\\ \begin{array}{r}\mathrm{131 }\end{array}\end{array}$

b = 582
(218 + b) − 416 = (218 + 582) − 416 = 800 − 416 = 384

Вычисления:
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}218\\ 582\end{array}}\\ \begin{array}{r}\mathrm{800 }\end{array}\end{array}$
 
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}800\\ 416\end{array}}\\ \begin{array}{r}\mathrm{384 }\end{array}\end{array}$

b = 144
(218 + b) − 416 = (218 + 144) − 416 = 362 − 416 − вычислить нельзя

Вычисления:
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}218\\ 144\end{array}}\\ \begin{array}{r}\mathrm{362 }\end{array}\end{array}$

b = 416
(218 + b) − 416 = (218 + 416) − 416 = 218 + (416 − 416) = 218 + 0 = 218