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