
When you ask "What number is halfway between 29 and 866?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=29 and Y=866.

To find the number halfway between 29 and 866, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 29 and 866 into our formula, we get:
(29 + 866)/2 = 447.5
Thus, the number halfway between 29 and 866 is 447.5.
To check that our answer is correct, we subtract 29 from 447.5 and subtract 447.5 from 866 and compare the two numbers:
447.5 - 29 = 418.5
866 - 447.5 = 418.5
As you can see, the halfway number is 418.5 higher than 29 and 418.5 lower than 866. Therefore, our halfway between answer of 447.5 above is correct.
Halfway Between
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Halfway Between 29 and 867
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