Вычисления:
45 + 45 = 90
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}45\\ 45\end{array}}\\ \begin{array}{r}90\end{array}\end{array}$
90 − 64 = 26
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}90\\ 64\end{array}}\\ \begin{array}{r}26\end{array}\end{array}$
35 + 36 = 71
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}35\\ 36\end{array}}\\ \begin{array}{r}71\end{array}\end{array}$
100 − 71 = 29
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}100\\ 71\end{array}}\\ \begin{array}{r}29\end{array}\end{array}$
82 + 18 = 100
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}82\\ 18\end{array}}\\ \begin{array}{r}100\end{array}\end{array}$
41 − 14 = 27
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}41\\ 14\end{array}}\\ \begin{array}{r}27\end{array}\end{array}$
76 + 24 = 100
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}76\\ 24\end{array}}\\ \begin{array}{r}100\end{array}\end{array}$
64 − 46 = 18
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}64\\ 46\end{array}}\\ \begin{array}{r}18\end{array}\end{array}$
53 − 19 = 34
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}53\\ 19\end{array}}\\ \begin{array}{r}34\end{array}\end{array}$