Помогите подалуйста
(2 3/9-1 7/9) = 6 4/9 - ( 4 2/9 + 8/9)= ( 1 11/9 - 1 7/9) = 6 4/9 - (4 2/9 + + 8/9)= 5/9 + 6 4/9 - 4 10/9 = 7 - 5 1/9 = 6 9/9 - 5 1/9= 1 8/9