Решите 1 1/7 - 5/7;2 3/11 - 7/11; 3 9/17 -11/17; 4 7/27 - 1 16/27
1 1/7 - 5/7 = 3/7 2 3/11 - 7/11 = 1 7/11 3 9/17 -11/17 = 2 15/17 4 7/27 - 1 16/27 = 2 2/3