When you ask "What number is halfway between 25 and 486?" 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=486.
To find the number halfway between 25 and 486, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 486 into our formula, we get:
(25 + 486)/2 = 255.5
Thus, the number halfway between 25 and 486 is 255.5.
To check that our answer is correct, we subtract 25 from 255.5 and subtract 255.5 from 486 and compare the two numbers:
255.5 - 25 = 230.5
486 - 255.5 = 230.5
As you can see, the halfway number is 230.5 higher than 25 and 230.5 lower than 486. Therefore, our halfway between answer of 255.5 above is correct.
Halfway Between
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Halfway Between 25 and 487
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