When you ask "What number is halfway between 12 and 499?" 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=499.
To find the number halfway between 12 and 499, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 499 into our formula, we get:
(12 + 499)/2 = 255.5
Thus, the number halfway between 12 and 499 is 255.5.
To check that our answer is correct, we subtract 12 from 255.5 and subtract 255.5 from 499 and compare the two numbers:
255.5 - 12 = 243.5
499 - 255.5 = 243.5
As you can see, the halfway number is 243.5 higher than 12 and 243.5 lower than 499. Therefore, our halfway between answer of 255.5 above is correct.
Halfway Between
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Halfway Between 12 and 500
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