When you ask "What number is halfway between 76 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=76 and Y=129.
To find the number halfway between 76 and 129, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 76 and 129 into our formula, we get:
(76 + 129)/2 = 102.5
Thus, the number halfway between 76 and 129 is 102.5.
To check that our answer is correct, we subtract 76 from 102.5 and subtract 102.5 from 129 and compare the two numbers:
102.5 - 76 = 26.5
129 - 102.5 = 26.5
As you can see, the halfway number is 26.5 higher than 76 and 26.5 lower than 129. Therefore, our halfway between answer of 102.5 above is correct.
Halfway Between
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Halfway Between 76 and 130
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