When you ask "What number is halfway between 30 and 863?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=30 and Y=863.
To find the number halfway between 30 and 863, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 863 into our formula, we get:
(30 + 863)/2 = 446.5
Thus, the number halfway between 30 and 863 is 446.5.
To check that our answer is correct, we subtract 30 from 446.5 and subtract 446.5 from 863 and compare the two numbers:
446.5 - 30 = 416.5
863 - 446.5 = 416.5
As you can see, the halfway number is 416.5 higher than 30 and 416.5 lower than 863. Therefore, our halfway between answer of 446.5 above is correct.
Halfway Between
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Halfway Between 30 and 864
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