When you ask "What number is halfway between 80 and 85?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=80 and Y=85.
To find the number halfway between 80 and 85, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 80 and 85 into our formula, we get:
(80 + 85)/2 = 82.5
Thus, the number halfway between 80 and 85 is 82.5.
To check that our answer is correct, we subtract 80 from 82.5 and subtract 82.5 from 85 and compare the two numbers:
82.5 - 80 = 2.5
85 - 82.5 = 2.5
As you can see, the halfway number is 2.5 higher than 80 and 2.5 lower than 85. Therefore, our halfway between answer of 82.5 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 80 and 86
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