When you ask "What number is halfway between 25 and 800?" 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=800.
To find the number halfway between 25 and 800, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 800 into our formula, we get:
(25 + 800)/2 = 412.5
Thus, the number halfway between 25 and 800 is 412.5.
To check that our answer is correct, we subtract 25 from 412.5 and subtract 412.5 from 800 and compare the two numbers:
412.5 - 25 = 387.5
800 - 412.5 = 387.5
As you can see, the halfway number is 387.5 higher than 25 and 387.5 lower than 800. Therefore, our halfway between answer of 412.5 above is correct.
Halfway Between
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Halfway Between 25 and 801
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