Задание
Найдите пропущенные числа:
| \(\displaystyle \frac{1}{7}+\frac{2}{3}=\) | [ ]\(\displaystyle \cdot \,1\) \(\displaystyle 3 \cdot 7\) | \(\displaystyle +\) | \(\displaystyle 2\, \cdot\)[ ] \(\displaystyle 3 \cdot 7\) | \(\displaystyle =\) | [ ] |