
When you ask "What number is halfway between 58 and 129?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=58 and Y=129.

To find the number halfway between 58 and 129, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 58 and 129 into our formula, we get:
(58 + 129)/2 = 93.5
Thus, the number halfway between 58 and 129 is 93.5.
To check that our answer is correct, we subtract 58 from 93.5 and subtract 93.5 from 129 and compare the two numbers:
93.5 - 58 = 35.5
129 - 93.5 = 35.5
As you can see, the halfway number is 35.5 higher than 58 and 35.5 lower than 129. Therefore, our halfway between answer of 93.5 above is correct.
Halfway Between
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Halfway Between 58 and 130
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