0
Wiki User
15
20
It is: 50
40
(10-20)/2 = -10/2 = negative 5
The fraction halfway between 2/5 and 9/10 is 13/20
-5
30
It is: 15
It is 20
17
the number between 2 and 20 is 11
It is: (20+80)/2 = 50