56 − (16 + 29) = 11
(38 + 49) − 18 = 69
(51 − 16) + (35 − 13) = 57
(48 + 50) − (63 + 17) = 18
Ответы в порядке увеличения: 11, 18, 57, 68.
Вычисления:
56 − (16 + 29) = 56 − 45 = 11
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}16\\ 29\end{array}}\\ \begin{array}{r}45\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}56\\ 45\end{array}}\\ \begin{array}{r}11\end{array}\end{array}$
(38 + 49) − 18 = 87 − 18 = 69
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}38\\ 49\end{array}}\\ \begin{array}{r}87\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}87\\ 18\end{array}}\\ \begin{array}{r}69\end{array}\end{array}$
(51 − 16) + (35 − 13) = 35 + 22 = 57
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}51\\ 16\end{array}}\\ \begin{array}{r}35\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}35\\ 13\end{array}}\\ \begin{array}{r}22\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}35\\ 22\end{array}}\\ \begin{array}{r}57\end{array}\end{array}$
(48 + 50) − (63 + 17) = 98 − 80 = 18
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}48\\ 50\end{array}}\\ \begin{array}{r}98\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}63\\ 17\end{array}}\\ \begin{array}{r}80\end{array}\end{array}$
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}98\\ 80\end{array}}\\ \begin{array}{r}18\end{array}\end{array}$