When you ask "What number is halfway between 8 and 487?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=487.
To find the number halfway between 8 and 487, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 487 into our formula, we get:
(8 + 487)/2 = 247.5
Thus, the number halfway between 8 and 487 is 247.5.
To check that our answer is correct, we subtract 8 from 247.5 and subtract 247.5 from 487 and compare the two numbers:
247.5 - 8 = 239.5
487 - 247.5 = 239.5
As you can see, the halfway number is 239.5 higher than 8 and 239.5 lower than 487. Therefore, our halfway between answer of 247.5 above is correct.
Halfway Between
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Halfway Between 8 and 488
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