When you ask "What number is halfway between 25 and 805?" 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=805.
To find the number halfway between 25 and 805, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 805 into our formula, we get:
(25 + 805)/2 = 415
Thus, the number halfway between 25 and 805 is 415.
To check that our answer is correct, we subtract 25 from 415 and subtract 415 from 805 and compare the two numbers:
415 - 25 = 390
805 - 415 = 390
As you can see, the halfway number is 390 higher than 25 and 390 lower than 805. Therefore, our halfway between answer of 415 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 25 and 806
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