3 5/9 +(-2 1/4) - (-4 5/6)-5 2/3

17/36

Пошаговое объяснение:

1) 3. 5/9 + (-2. 1/4) = 3. 5/9 - 2. 1/4 = 3. 20/36 - 2. 9/36 = 1. 11/36

2) 1. 11/36 - (-4. 5/6) = 1. 11/36 + 4. 5/6 = 1. 11/36 + 4. 30/36 = 5. 41/36

3) 5. 41/36 - 5. 2/3 = 5. 41/36 - 5. 24/36 = 17/36