When you ask "What number is halfway between 42 and 939?" 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=939.
To find the number halfway between 42 and 939, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 939 into our formula, we get:
(42 + 939)/2 = 490.5
Thus, the number halfway between 42 and 939 is 490.5.
To check that our answer is correct, we subtract 42 from 490.5 and subtract 490.5 from 939 and compare the two numbers:
490.5 - 42 = 448.5
939 - 490.5 = 448.5
As you can see, the halfway number is 448.5 higher than 42 and 448.5 lower than 939. Therefore, our halfway between answer of 490.5 above is correct.
Halfway Between
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Halfway Between 42 and 940
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