When you ask "What number is halfway between 26 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=26 and Y=815.
To find the number halfway between 26 and 815, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 26 and 815 into our formula, we get:
(26 + 815)/2 = 420.5
Thus, the number halfway between 26 and 815 is 420.5.
To check that our answer is correct, we subtract 26 from 420.5 and subtract 420.5 from 815 and compare the two numbers:
420.5 - 26 = 394.5
815 - 420.5 = 394.5
As you can see, the halfway number is 394.5 higher than 26 and 394.5 lower than 815. Therefore, our halfway between answer of 420.5 above is correct.
Halfway Between
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Halfway Between 26 and 816
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