When you ask "What number is halfway between 34 and 139?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=34 and Y=139.
To find the number halfway between 34 and 139, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 34 and 139 into our formula, we get:
(34 + 139)/2 = 86.5
Thus, the number halfway between 34 and 139 is 86.5.
To check that our answer is correct, we subtract 34 from 86.5 and subtract 86.5 from 139 and compare the two numbers:
86.5 - 34 = 52.5
139 - 86.5 = 52.5
As you can see, the halfway number is 52.5 higher than 34 and 52.5 lower than 139. Therefore, our halfway between answer of 86.5 above is correct.
Halfway Between
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Halfway Between 34 and 140
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