Задание
Найдите пропущенные числа:
| \(\displaystyle \frac{1}{3}+\frac{4}{7}=\) | \(\displaystyle 1 \cdot 7\) \(\displaystyle 3\,\cdot\)[ ] | \(\displaystyle +\) | \(\displaystyle 3 \cdot 4\) [ ]\(\displaystyle \cdot\,7\) | \(\displaystyle =\) | [ ] |