When you ask "What number is halfway between 42 and 623?" 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=623.
To find the number halfway between 42 and 623, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 623 into our formula, we get:
(42 + 623)/2 = 332.5
Thus, the number halfway between 42 and 623 is 332.5.
To check that our answer is correct, we subtract 42 from 332.5 and subtract 332.5 from 623 and compare the two numbers:
332.5 - 42 = 290.5
623 - 332.5 = 290.5
As you can see, the halfway number is 290.5 higher than 42 and 290.5 lower than 623. Therefore, our halfway between answer of 332.5 above is correct.
Halfway Between
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Halfway Between 42 and 624
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