Сложите дроби 
а)11/27 + 4/9
б) 8/11 + 5/44
в)11/25 + 2/5
г)1/6 + 13/36

a) 11/27 + 4/9 = 11/27 + 12/27= 21/27= 7/9б) 8/11 + 5/44 = 32/44 + 5/44 = 37/44в) 11/25 + 2/5 = 11/25+ 10/25 = 21/25г) 1/6 + 13/36 = 6/36 + 13/36 = 19/36