Срочно !!!!!!!!!!!!!!!!!!!!!!!!

Question

Срочно !!!!!!!!!!!!!!!!!!!!!!!!

---

Answer 1

1) 215+7/15 = 3/5
2) 2/15-7/15 = -1/3
3) -2/15-7/15 = -3/5
4) -2/15+7/15 = 1/3
5) 8/25+12/25 = 4/5
6) -8/25-12/25 = -4/5
7) -8/25+12/25 = 4/25
8) 8/25-12/25 = -4/25