When you ask "What number is halfway between 25 and 81?" 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=81.
To find the number halfway between 25 and 81, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 81 into our formula, we get:
(25 + 81)/2 = 53
Thus, the number halfway between 25 and 81 is 53.
To check that our answer is correct, we subtract 25 from 53 and subtract 53 from 81 and compare the two numbers:
53 - 25 = 28
81 - 53 = 28
As you can see, the halfway number is 28 higher than 25 and 28 lower than 81. Therefore, our halfway between answer of 53 above is correct.
Halfway Between
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Halfway Between 25 and 82
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