-7/5 + 18/35 * 1 22/27 + 4 : 6 2/13
1 22/27 = (1 * 27 + 22)/27 = 49/27
6 2/13 = (6 * 13 + 2)/13 = 80/13
18/35 * 49/27 = (2 * 9)/(5 * 7) * (7 * 7)/(3 * 9) = (2 * 7)/(5 * 3) = 14/15
4 : 80/13 = 4 * 13/80 = (4 * 13) / (4 * 20) = 13/20
-7/5 + 14/15 + 13/20 = (-7 * 12)/(5 * 12) + (14 * 4)/(15 * 4) + (13 * 3)/(20 * 3) = -84/60 + 56/60 + 39/60 = (-84 + 56 + 39)/60 = 11/60
Ответ: 11/60
2 1/3 : (5/8 - 8/3) + 2 * 1 3/7
2 1/3 = (2 * 3 + 1)/3 = 7/3
1 3/7 = (1 * 7 + 3)/7 = 10/7
5/8 - 8/3 = (5 * 3)/(8 * 3) - (8 * 8)/(3 * 8) = 15/24 - 64/24 = -49/24
7/3 : (-49/24) = 7/3 * (-24/49) = (7 * -8 * 3)/(3 * 7 * 7) = -8/7
2 * 10/7 = 20/7
-8/7 + 20/7 = 12/7
12/7 = 1 5/7
Ответ: 1 5/7