Question

Помогите пожалуйста:
3 2/7+5 5/7-1 5/9-2 8/9=?

Answer 1

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

Answer 2

3 2/7 + 5 5/7 - 1 5/9 - 2 8/9 = 23"7 + 40/7 - 14/9 - 26/9 = 41/90