383 − 190 = 193 − верно
407 + 288 = 685 − неверно, верно будет: 407 + 288 = 695
56 + 754 = 810 − верно
716 − 78 = 636 − неверно, верно будет: 716 − 78 = 638
Вычисления:
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}383\\ 190\end{array}}\\ \begin{array}{r}193\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}407\\ 288\end{array}}\\ \begin{array}{r}695\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}56\\ 754\end{array}}\\ \begin{array}{r}810\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}716\\ 78\end{array}}\\ \begin{array}{r}638\end{array}\end{array}$