69 + 15 = 14 + 70
44 – 25 > 53 – 36
28 + 39 < 46 + 37
86 – 28 > 64 – 15
Вычисления:
69 + 15 = 14 + 70
69 + 15 = 84
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}69\\ 15\end{array}}\\ \begin{array}{r}84\end{array}\end{array}$
14 + 70 = 84
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}14\\ 70\end{array}}\\ \begin{array}{r}84\end{array}\end{array}$
44 – 25 > 53 – 36
44 – 25 = 19
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}44\\ 25\end{array}}\\ \begin{array}{r}19\end{array}\end{array}$
53 – 36 = 17
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}53\\ 36\end{array}}\\ \begin{array}{r}17\end{array}\end{array}$
28 + 39 < 46 + 37
28 + 39 = 67
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}28\\ 39\end{array}}\\ \begin{array}{r}67\end{array}\end{array}$
46 + 37 = 83
$\begin{array}{r}\begin{array}{r}+\end{array}\underline{\begin{array}{r}46\\ 37\end{array}}\\ \begin{array}{r}83\end{array}\end{array}$
86 – 28 > 64 – 15
86 – 28 = 58
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}86\\ 28\end{array}}\\ \begin{array}{r}58\end{array}\end{array}$
64 – 15 = 49
$\begin{array}{r}\begin{array}{r}-\end{array}\underline{\begin{array}{r}64\\ 15\end{array}}\\ \begin{array}{r}49\end{array}\end{array}$