Памогите пажалюйста!!!!!!

Question

Памогите пажалюйста!!!!!!

---

Answer 1

1)=31/60+21/60+11/60=63/60=1 1/20

2)=53/54-9/54-42/54=2/54=1/27

3)=13/35+23/35-10/35=26/35

4)7/16-12/16+5/16=0