When you ask "What number is halfway between 25 and 680?" 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=680.
To find the number halfway between 25 and 680, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 680 into our formula, we get:
(25 + 680)/2 = 352.5
Thus, the number halfway between 25 and 680 is 352.5.
To check that our answer is correct, we subtract 25 from 352.5 and subtract 352.5 from 680 and compare the two numbers:
352.5 - 25 = 327.5
680 - 352.5 = 327.5
As you can see, the halfway number is 327.5 higher than 25 and 327.5 lower than 680. Therefore, our halfway between answer of 352.5 above is correct.
Halfway Between
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