(11 2/3- 8 3/4)+(3 1/3+2 5/6)-4 7/12

1)
11 2/3 = 11 4/12.
8 3/4 = 8 9/12.
11 4/12 - 8 9/12 = 2 7/12.
2)
3 1/3 = 3 2/6
3 2/6 + 2 5/6 = 6 1/6.
3)
6 1/6 = 6 2/12.
2 7/12 + 6 2 /12 = 8 9/12.
4)
8 9/12 - 4 7/12 = 4 2/12 = 4 1/7.
ответ: 4 1/7

1) 11 2/3-8 3/4=35/3-35/4=35×4/12+35×3/12=20 5/12