When you ask "What number is halfway between 25 and 117?" 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=117.
To find the number halfway between 25 and 117, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 117 into our formula, we get:
(25 + 117)/2 = 71
Thus, the number halfway between 25 and 117 is 71.
To check that our answer is correct, we subtract 25 from 71 and subtract 71 from 117 and compare the two numbers:
71 - 25 = 46
117 - 71 = 46
As you can see, the halfway number is 46 higher than 25 and 46 lower than 117. Therefore, our halfway between answer of 71 above is correct.
Halfway Between
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Halfway Between 25 and 118
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