When you ask "What number is halfway between 17 and 504?" 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=504.
To find the number halfway between 17 and 504, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 504 into our formula, we get:
(17 + 504)/2 = 260.5
Thus, the number halfway between 17 and 504 is 260.5.
To check that our answer is correct, we subtract 17 from 260.5 and subtract 260.5 from 504 and compare the two numbers:
260.5 - 17 = 243.5
504 - 260.5 = 243.5
As you can see, the halfway number is 243.5 higher than 17 and 243.5 lower than 504. Therefore, our halfway between answer of 260.5 above is correct.
Halfway Between
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Halfway Between 17 and 505
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