When you ask "What number is halfway between 25 and 978?" 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=978.
To find the number halfway between 25 and 978, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 978 into our formula, we get:
(25 + 978)/2 = 501.5
Thus, the number halfway between 25 and 978 is 501.5.
To check that our answer is correct, we subtract 25 from 501.5 and subtract 501.5 from 978 and compare the two numbers:
501.5 - 25 = 476.5
978 - 501.5 = 476.5
As you can see, the halfway number is 476.5 higher than 25 and 476.5 lower than 978. Therefore, our halfway between answer of 501.5 above is correct.
Halfway Between
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Halfway Between 25 and 979
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