12
Halfway between 10 and 15 is (10 + 15) ÷ 2 = 121/2
Halfway between 8 and 9
10 is the number halfway between -5 and 15.It is: 5
11.5 is halfway between 8 and 15
What number is halfway between 8 & 9
The halfway number is (15 + 129) /2 = 144/2 = 72
15
-5
22.5
It is 15
Halfway between 2/9 and 5/9 is 3.5/9, more correctly expressed as 7/18.