Question

Помогите пж умоляяяяяяяю

Answer 1

1) 1/2 + 7/9 = 9+14/18 = 23/18

2) 5/7 + 0 = 5/7

3) 2/3 - 2/5 = 10-6/15 = 4/15

4) 1/2 + 5/8 = 4+5/8 = 9/8

5) 1/2 - 1/3 = 3-2/6 = 1/6