When you ask "What number is halfway between 83 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=83 and Y=129.
To find the number halfway between 83 and 129, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 83 and 129 into our formula, we get:
(83 + 129)/2 = 106
Thus, the number halfway between 83 and 129 is 106.
To check that our answer is correct, we subtract 83 from 106 and subtract 106 from 129 and compare the two numbers:
106 - 83 = 23
129 - 106 = 23
As you can see, the halfway number is 23 higher than 83 and 23 lower than 129. Therefore, our halfway between answer of 106 above is correct.
Halfway Between
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Halfway Between 83 and 130
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