Задание
Найдите пропущенные числа:
| \(\displaystyle \frac{2}{7}+\frac{1}{5}=\) | \(\displaystyle 2 \cdot 5\) \(\displaystyle 7\,\cdot\)[ ] | \(\displaystyle +\) | \(\displaystyle 7 \cdot 1\) [ ]\(\displaystyle \cdot\,5\) | \(\displaystyle =\) | [ ] |