Задание
Найдите пропущенные числа:
| \(\displaystyle \frac{4}{9}+\frac{2}{7}=\) | \(\displaystyle 4 \cdot 7\) \(\displaystyle 9\,\cdot\)[ ] | \(\displaystyle +\) | \(\displaystyle 9 \cdot 2\) [ ]\(\displaystyle \cdot\,7\) | \(\displaystyle =\) | [ ] |