When you ask "What number is halfway between 7 and 558?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=7 and Y=558.
To find the number halfway between 7 and 558, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 558 into our formula, we get:
(7 + 558)/2 = 282.5
Thus, the number halfway between 7 and 558 is 282.5.
To check that our answer is correct, we subtract 7 from 282.5 and subtract 282.5 from 558 and compare the two numbers:
282.5 - 7 = 275.5
558 - 282.5 = 275.5
As you can see, the halfway number is 275.5 higher than 7 and 275.5 lower than 558. Therefore, our halfway between answer of 282.5 above is correct.
Halfway Between
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Halfway Between 7 and 559
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