When you ask "What number is halfway between 64 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=64 and Y=855.
To find the number halfway between 64 and 855, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 64 and 855 into our formula, we get:
(64 + 855)/2 = 459.5
Thus, the number halfway between 64 and 855 is 459.5.
To check that our answer is correct, we subtract 64 from 459.5 and subtract 459.5 from 855 and compare the two numbers:
459.5 - 64 = 395.5
855 - 459.5 = 395.5
As you can see, the halfway number is 395.5 higher than 64 and 395.5 lower than 855. Therefore, our halfway between answer of 459.5 above is correct.
Halfway Between
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Halfway Between 64 and 856
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