Задание

Найдите пропущенные числа:

\(\displaystyle \frac{1}{2}+\frac{2}{5}=\)
[ ]\(\displaystyle \cdot \,1\)
 
\(\displaystyle 5 \cdot 2\)
\(\displaystyle +\)
\(\displaystyle 2\, \cdot\)[ ]
 
\(\displaystyle 5 \cdot 2\)
\(\displaystyle =\)[ ]
 
[ ]