When you ask "What number is halfway between 10 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=10 and Y=487.
To find the number halfway between 10 and 487, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 487 into our formula, we get:
(10 + 487)/2 = 248.5
Thus, the number halfway between 10 and 487 is 248.5.
To check that our answer is correct, we subtract 10 from 248.5 and subtract 248.5 from 487 and compare the two numbers:
248.5 - 10 = 238.5
487 - 248.5 = 238.5
As you can see, the halfway number is 238.5 higher than 10 and 238.5 lower than 487. Therefore, our halfway between answer of 248.5 above is correct.
Halfway Between
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Halfway Between 10 and 488
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