
When you ask "What number is halfway between 25 and 634?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=634.

To find the number halfway between 25 and 634, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 634 into our formula, we get:
(25 + 634)/2 = 329.5
Thus, the number halfway between 25 and 634 is 329.5.
To check that our answer is correct, we subtract 25 from 329.5 and subtract 329.5 from 634 and compare the two numbers:
329.5 - 25 = 304.5
634 - 329.5 = 304.5
As you can see, the halfway number is 304.5 higher than 25 and 304.5 lower than 634. Therefore, our halfway between answer of 329.5 above is correct.
Halfway Between
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Halfway Between 25 and 635
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