Question

2/3+5/6 2/15+3/5 7/10+3/20 11/15+4/45

Answer 1

last questions

Answer 2

2/3 turns into 4/6
4/6+5/6 = 9/6 which converts to 3/2

Answer 3

3/5 turns into 9/15
2/15+9/15 = 11/15

Answer 4

7/10 turns into 14/20
14/20+3/20 = 17/20

11/15 turns into 33/45
33/45+4/45 = 37/45