
When you ask "What number is halfway between 25 and 872?" 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=872.

To find the number halfway between 25 and 872, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 872 into our formula, we get:
(25 + 872)/2 = 448.5
Thus, the number halfway between 25 and 872 is 448.5.
To check that our answer is correct, we subtract 25 from 448.5 and subtract 448.5 from 872 and compare the two numbers:
448.5 - 25 = 423.5
872 - 448.5 = 423.5
As you can see, the halfway number is 423.5 higher than 25 and 423.5 lower than 872. Therefore, our halfway between answer of 448.5 above is correct.
Halfway Between
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Halfway Between 25 and 873
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