When you ask "What number is halfway between 25 and 125?" 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=125.
To find the number halfway between 25 and 125, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 125 into our formula, we get:
(25 + 125)/2 = 75
Thus, the number halfway between 25 and 125 is 75.
To check that our answer is correct, we subtract 25 from 75 and subtract 75 from 125 and compare the two numbers:
75 - 25 = 50
125 - 75 = 50
As you can see, the halfway number is 50 higher than 25 and 50 lower than 125. Therefore, our halfway between answer of 75 above is correct.
Halfway Between
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Halfway Between 25 and 126
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