
When you ask "What number is halfway between 42 and 327?" 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=327.

To find the number halfway between 42 and 327, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 327 into our formula, we get:
(42 + 327)/2 = 184.5
Thus, the number halfway between 42 and 327 is 184.5.
To check that our answer is correct, we subtract 42 from 184.5 and subtract 184.5 from 327 and compare the two numbers:
184.5 - 42 = 142.5
327 - 184.5 = 142.5
As you can see, the halfway number is 142.5 higher than 42 and 142.5 lower than 327. Therefore, our halfway between answer of 184.5 above is correct.
Halfway Between
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Halfway Between 42 and 328
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