-12.5
-5
10
-5
There is no "the" rational" number since there is an infinity of them. Start with the number halfway between the two: (1/10+1/11)/2 = 21/220. Then try halfway between 1/10 and 21/220, and then halfway between 1/10 and that on. And so on.
It is 10, the number halfway between them.
20
-5
halfway between 154 and 164 is 10
(10-20)/2 = -10/2 = negative 5
10 is the number halfway between -5 and 15.It is: 5
Add two numbers together and divide sum by two to find midway point.(-10+6)/2=-4/2=-2Therefore, the number that is halfway between -10 and 6 is -2 (negative two).
Halfway between 10 and 15 is (10 + 15) ÷ 2 = 121/2
10
15
10.25
-5
Exactly halfway between them is 10.15.