When you ask "What number is halfway between 12 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=12 and Y=239.
To find the number halfway between 12 and 239, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 239 into our formula, we get:
(12 + 239)/2 = 125.5
Thus, the number halfway between 12 and 239 is 125.5.
To check that our answer is correct, we subtract 12 from 125.5 and subtract 125.5 from 239 and compare the two numbers:
125.5 - 12 = 113.5
239 - 125.5 = 113.5
As you can see, the halfway number is 113.5 higher than 12 and 113.5 lower than 239. Therefore, our halfway between answer of 125.5 above is correct.
Halfway Between
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Halfway Between 12 and 240
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