а) 5/6 - 3/4 = 10/12 - 9/12 = 1/12б) 3/10 + 1/2 = 3/10 + 5/10 = 8/10 = 4/5в) 2/9 + 0 = 2/9г) 19/75 - 11/50 = 38/150 - 33/150 = 5/150 = 1/30д) 11/14 + 8/21 = 33/42 + 16/42 = 49/42 = 7/6
а) 5/6 - 3/4 = 10/12 - 9/12 = 1/12
б) 3/10 + 1/2 = 3/10 + 5/10 = 8/10 = 4/5
в) 2/9 + 0 = 2/9
г) 19/75 - 11/50 = 38/150 - 33/150 = 5/150 = 1/30
д) 11/14 + 8/21 = 33/42 + 16/42 = 49/42 = 7/6