When you ask "What number is halfway between 8 and 855?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=855.
To find the number halfway between 8 and 855, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 855 into our formula, we get:
(8 + 855)/2 = 431.5
Thus, the number halfway between 8 and 855 is 431.5.
To check that our answer is correct, we subtract 8 from 431.5 and subtract 431.5 from 855 and compare the two numbers:
431.5 - 8 = 423.5
855 - 431.5 = 423.5
As you can see, the halfway number is 423.5 higher than 8 and 423.5 lower than 855. Therefore, our halfway between answer of 431.5 above is correct.
Halfway Between
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Halfway Between 8 and 856
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