
When you ask "What number is halfway between 40 and 500?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=40 and Y=500.

To find the number halfway between 40 and 500, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 40 and 500 into our formula, we get:
(40 + 500)/2 = 270
Thus, the number halfway between 40 and 500 is 270.
To check that our answer is correct, we subtract 40 from 270 and subtract 270 from 500 and compare the two numbers:
270 - 40 = 230
500 - 270 = 230
As you can see, the halfway number is 230 higher than 40 and 230 lower than 500. Therefore, our halfway between answer of 270 above is correct.
Halfway Between
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Halfway Between 40 and 501
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