When you ask "What number is halfway between 25 and 478?" 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=478.
To find the number halfway between 25 and 478, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 478 into our formula, we get:
(25 + 478)/2 = 251.5
Thus, the number halfway between 25 and 478 is 251.5.
To check that our answer is correct, we subtract 25 from 251.5 and subtract 251.5 from 478 and compare the two numbers:
251.5 - 25 = 226.5
478 - 251.5 = 226.5
As you can see, the halfway number is 226.5 higher than 25 and 226.5 lower than 478. Therefore, our halfway between answer of 251.5 above is correct.
Halfway Between
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Halfway Between 25 and 479
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