When you ask "What number is halfway between 17 and 486?" 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=486.
To find the number halfway between 17 and 486, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 486 into our formula, we get:
(17 + 486)/2 = 251.5
Thus, the number halfway between 17 and 486 is 251.5.
To check that our answer is correct, we subtract 17 from 251.5 and subtract 251.5 from 486 and compare the two numbers:
251.5 - 17 = 234.5
486 - 251.5 = 234.5
As you can see, the halfway number is 234.5 higher than 17 and 234.5 lower than 486. Therefore, our halfway between answer of 251.5 above is correct.
Halfway Between
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Halfway Between 17 and 487
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