Сколько будет 1-17/30-11/30 и 1-10/11
1-17/30-11/30 = 1 - 28/30 = 1- 14/15 = 15/15 - 14/15 = 1/15 1-10/11 = 11/11-10/11 = 1/11
1-17/30-11/30=1/15 1-10/11=1/11