When you ask "What number is halfway between 17 and 506?" 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=506.
To find the number halfway between 17 and 506, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 506 into our formula, we get:
(17 + 506)/2 = 261.5
Thus, the number halfway between 17 and 506 is 261.5.
To check that our answer is correct, we subtract 17 from 261.5 and subtract 261.5 from 506 and compare the two numbers:
261.5 - 17 = 244.5
506 - 261.5 = 244.5
As you can see, the halfway number is 244.5 higher than 17 and 244.5 lower than 506. Therefore, our halfway between answer of 261.5 above is correct.
Halfway Between
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Halfway Between 17 and 507
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