When you ask "What number is halfway between 29 and 109?" 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=109.
To find the number halfway between 29 and 109, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 29 and 109 into our formula, we get:
(29 + 109)/2 = 69
Thus, the number halfway between 29 and 109 is 69.
To check that our answer is correct, we subtract 29 from 69 and subtract 69 from 109 and compare the two numbers:
69 - 29 = 40
109 - 69 = 40
As you can see, the halfway number is 40 higher than 29 and 40 lower than 109. Therefore, our halfway between answer of 69 above is correct.
Halfway Between
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Halfway Between 29 and 110
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