When you ask "What number is halfway between 17 and 580?" 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=580.
To find the number halfway between 17 and 580, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 580 into our formula, we get:
(17 + 580)/2 = 298.5
Thus, the number halfway between 17 and 580 is 298.5.
To check that our answer is correct, we subtract 17 from 298.5 and subtract 298.5 from 580 and compare the two numbers:
298.5 - 17 = 281.5
580 - 298.5 = 281.5
As you can see, the halfway number is 281.5 higher than 17 and 281.5 lower than 580. Therefore, our halfway between answer of 298.5 above is correct.
Halfway Between
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Halfway Between 17 and 581
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