When you ask "What number is halfway between 42 and 627?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=627.
To find the number halfway between 42 and 627, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 627 into our formula, we get:
(42 + 627)/2 = 334.5
Thus, the number halfway between 42 and 627 is 334.5.
To check that our answer is correct, we subtract 42 from 334.5 and subtract 334.5 from 627 and compare the two numbers:
334.5 - 42 = 292.5
627 - 334.5 = 292.5
As you can see, the halfway number is 292.5 higher than 42 and 292.5 lower than 627. Therefore, our halfway between answer of 334.5 above is correct.
Halfway Between
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Halfway Between 42 and 628
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