When you ask "What number is halfway between 8 and 25?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=25.
To find the number halfway between 8 and 25, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 25 into our formula, we get:
(8 + 25)/2 = 16.5
Thus, the number halfway between 8 and 25 is 16.5.
To check that our answer is correct, we subtract 8 from 16.5 and subtract 16.5 from 25 and compare the two numbers:
16.5 - 8 = 8.5
25 - 16.5 = 8.5
As you can see, the halfway number is 8.5 higher than 8 and 8.5 lower than 25. Therefore, our halfway between answer of 16.5 above is correct.
Halfway Between
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