1 (1/4) (-2 (2/3)) + 4/5 2 (11/12) - 1 (1/6) : (21/22) =
1 (1/4) (-8/3) + 40/5 35/12 - 1 (1/6) * 22/21 =
-2/3 + 8 + 44/2 - 11/6 =
-2/3 + 8 + 22 - 11/6 =
8 - 11/6 - 2/3 + 44/12 =
48/6 - 11/6 - 4/6 + 44/12 =
(48 - 11 - 4 + 44)/12 =
77/12 - 15/6 =
77/12 - 30/12 =
47/12.
Ответ: 3 (11/12).
1 (1/4) (-2 (2/3)) + 4/5 2 (11/12) - 1 (1/6) : (21/22) =
1 (1/4) (-8/3) + 40/5 35/12 - 1 (1/6) * 22/21 =
-2/3 + 8 + 44/2 - 11/6 =
-2/3 + 8 + 22 - 11/6 =
8 - 11/6 - 2/3 + 44/12 =
48/6 - 11/6 - 4/6 + 44/12 =
(48 - 11 - 4 + 44)/12 =
77/12 - 15/6 =
77/12 - 30/12 =
47/12.
Ответ: 3 (11/12).