When you ask "What number is halfway between 48 and 815?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=48 and Y=815.
To find the number halfway between 48 and 815, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 48 and 815 into our formula, we get:
(48 + 815)/2 = 431.5
Thus, the number halfway between 48 and 815 is 431.5.
To check that our answer is correct, we subtract 48 from 431.5 and subtract 431.5 from 815 and compare the two numbers:
431.5 - 48 = 383.5
815 - 431.5 = 383.5
As you can see, the halfway number is 383.5 higher than 48 and 383.5 lower than 815. Therefore, our halfway between answer of 431.5 above is correct.
Halfway Between
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Halfway Between 48 and 816
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