Question

3 целых 2/7 + 5 целых 5/7 - 1 целая 5/9 -2 целых 8/9

Answer 1

1. 3 целых 27+ 5 целых 57= 9 
2. -1 целая 59- 2 целая 89= -4 целых 4/9
3.9 - 4 целых 4/9= 4 целых 59

Answer 2

3 2/7 + 5 5/7 - 1 5/9 - 2 8/9 = (3 + 5 - 1 - 2) + (2/7 + 5/7 - 5/9 - 8/9) = 5 + (1 - 13/9) = 4 + (2 - 1 4/9) = 4 + 5/9 = 4 5/9