When you ask "What number is halfway between 17 and 508?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=17 and Y=508.
To find the number halfway between 17 and 508, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 508 into our formula, we get:
(17 + 508)/2 = 262.5
Thus, the number halfway between 17 and 508 is 262.5.
To check that our answer is correct, we subtract 17 from 262.5 and subtract 262.5 from 508 and compare the two numbers:
262.5 - 17 = 245.5
508 - 262.5 = 245.5
As you can see, the halfway number is 245.5 higher than 17 and 245.5 lower than 508. Therefore, our halfway between answer of 262.5 above is correct.
Halfway Between
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Halfway Between 17 and 509
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