Question

Помогите пожалуйста ​

Answer 1

2) -2/5 + 3/5 = (3-2)/5 = 0,2

4) -3/7-4/7 = (-3-7)/7 = -7/7 = -1

6) -1/9 - 2/9 = (-1-2)/9 = -3/9 = -1/3