
When you ask "What number is halfway between 25 and 45?" 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=45.

To find the number halfway between 25 and 45, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 45 into our formula, we get:
(25 + 45)/2 = 35
Thus, the number halfway between 25 and 45 is 35.
To check that our answer is correct, we subtract 25 from 35 and subtract 35 from 45 and compare the two numbers:
35 - 25 = 10
45 - 35 = 10
As you can see, the halfway number is 10 higher than 25 and 10 lower than 45. Therefore, our halfway between answer of 35 above is correct.
Halfway Between
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Halfway Between 25 and 46
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