3/7×2/5=6/35
1ц.1/9×2/10=1ц.2/90сокр.=1ц.1/45
7/13×39/56=273/728
4/11×4ц.7/12=4ц.28/132
3ц.1/9×2ц.1/2=6ц.1/18
Пошаговое объяснение:
3/7×2/5=6/35
1ц.1/9×2/10=1ц.2/90сокр.=1ц.1/45
7/13×39/56=273/728
4/11×4ц.7/12=4ц.28/132
3ц.1/9×2ц.1/2=6ц.1/18
Пошаговое объяснение: