Сложение и вычитание дробей 1/12+5/6, 11/12-2/8, 1-4/7,6/27+1/18

1/12+5/6 = 1/12+10/12 = 11/1211/12-2/8 = 22/24-6/24 = 16/24 = 2/31-4/7 = 7/7-4/7 = 3/76/27+1/18 = 18/56+3/56 = 21/56