When you ask "What number is halfway between 25 and 120?" 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=120.
To find the number halfway between 25 and 120, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 120 into our formula, we get:
(25 + 120)/2 = 72.5
Thus, the number halfway between 25 and 120 is 72.5.
To check that our answer is correct, we subtract 25 from 72.5 and subtract 72.5 from 120 and compare the two numbers:
72.5 - 25 = 47.5
120 - 72.5 = 47.5
As you can see, the halfway number is 47.5 higher than 25 and 47.5 lower than 120. Therefore, our halfway between answer of 72.5 above is correct.
Halfway Between
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Halfway Between 25 and 121
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