
When you ask "What number is halfway between 29 and 858?" 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=858.

To find the number halfway between 29 and 858, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 29 and 858 into our formula, we get:
(29 + 858)/2 = 443.5
Thus, the number halfway between 29 and 858 is 443.5.
To check that our answer is correct, we subtract 29 from 443.5 and subtract 443.5 from 858 and compare the two numbers:
443.5 - 29 = 414.5
858 - 443.5 = 414.5
As you can see, the halfway number is 414.5 higher than 29 and 414.5 lower than 858. Therefore, our halfway between answer of 443.5 above is correct.
Halfway Between
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Halfway Between 29 and 859
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