When you ask "What number is halfway between 12 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=12 and Y=487.
To find the number halfway between 12 and 487, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 487 into our formula, we get:
(12 + 487)/2 = 249.5
Thus, the number halfway between 12 and 487 is 249.5.
To check that our answer is correct, we subtract 12 from 249.5 and subtract 249.5 from 487 and compare the two numbers:
249.5 - 12 = 237.5
487 - 249.5 = 237.5
As you can see, the halfway number is 237.5 higher than 12 and 237.5 lower than 487. Therefore, our halfway between answer of 249.5 above is correct.
Halfway Between
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Halfway Between 12 and 488
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