When you ask "What number is halfway between 30 and 239?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=30 and Y=239.
To find the number halfway between 30 and 239, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 239 into our formula, we get:
(30 + 239)/2 = 134.5
Thus, the number halfway between 30 and 239 is 134.5.
To check that our answer is correct, we subtract 30 from 134.5 and subtract 134.5 from 239 and compare the two numbers:
134.5 - 30 = 104.5
239 - 134.5 = 104.5
As you can see, the halfway number is 104.5 higher than 30 and 104.5 lower than 239. Therefore, our halfway between answer of 134.5 above is correct.
Halfway Between
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Halfway Between 30 and 240
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