Halfway between 30 and 80 is (30 + 80) ÷ 2 = 55.
10 is the number halfway between -5 and 15.It is: 5
It is 25
(30+60)/2 = 45
15
Halfway between 30 and 80 is (30 + 80) ÷ 2 = 55.
It is 23.5, which is the value halfway between the two middle values.
11.5 is halfway between 8 and 15
10 is the number halfway between -5 and 15.It is: 5
It is: 55
The halfway number is (15 + 129) /2 = 144/2 = 72
15
-5
It is 15
50
It is 25
It is: 30