Задание
Найдите пропущенные числа:
| \(\displaystyle \frac{2}{7}+\frac{3}{5}=\) | [ ]\(\displaystyle \cdot \,2\) \(\displaystyle 5 \cdot 7\) | \(\displaystyle +\) | \(\displaystyle 3\, \cdot\)[ ] \(\displaystyle 5 \cdot 7\) | \(\displaystyle =\) | [ ] |