When you ask "What number is halfway between 17 and 554?" 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=554.
To find the number halfway between 17 and 554, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 554 into our formula, we get:
(17 + 554)/2 = 285.5
Thus, the number halfway between 17 and 554 is 285.5.
To check that our answer is correct, we subtract 17 from 285.5 and subtract 285.5 from 554 and compare the two numbers:
285.5 - 17 = 268.5
554 - 285.5 = 268.5
As you can see, the halfway number is 268.5 higher than 17 and 268.5 lower than 554. Therefore, our halfway between answer of 285.5 above is correct.
Halfway Between
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Halfway Between 17 and 555
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