When you ask "What number is halfway between 7 and 624?" 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=624.
To find the number halfway between 7 and 624, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 7 and 624 into our formula, we get:
(7 + 624)/2 = 315.5
Thus, the number halfway between 7 and 624 is 315.5.
To check that our answer is correct, we subtract 7 from 315.5 and subtract 315.5 from 624 and compare the two numbers:
315.5 - 7 = 308.5
624 - 315.5 = 308.5
As you can see, the halfway number is 308.5 higher than 7 and 308.5 lower than 624. Therefore, our halfway between answer of 315.5 above is correct.
Halfway Between
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Halfway Between 7 and 625
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