(4 5/6-2,5)×12-27×5/9=
(4 5/6-2,5)×12-27×5/9 = 13 1) 4 5/6-2,5 = 4 5/6 - 2 5/10 = 4 5/6 - 2 1/2 = 4 5/6 - 2 3/6 = 2 2/6 = 2 целых 1/3 2) 2 1/3 × 12 = 7/3 × 12 = 7 × 4 = 28 3) 27 × 5/9 = 3 × 5 = 15 4) 28 - 15 = 13