When you ask "What number is halfway between 48 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=48 and Y=129.
To find the number halfway between 48 and 129, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 48 and 129 into our formula, we get:
(48 + 129)/2 = 88.5
Thus, the number halfway between 48 and 129 is 88.5.
To check that our answer is correct, we subtract 48 from 88.5 and subtract 88.5 from 129 and compare the two numbers:
88.5 - 48 = 40.5
129 - 88.5 = 40.5
As you can see, the halfway number is 40.5 higher than 48 and 40.5 lower than 129. Therefore, our halfway between answer of 88.5 above is correct.
Halfway Between
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Halfway Between 48 and 130
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