
When you ask "What number is halfway between 55 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=55 and Y=239.

To find the number halfway between 55 and 239, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 239 into our formula, we get:
(55 + 239)/2 = 147
Thus, the number halfway between 55 and 239 is 147.
To check that our answer is correct, we subtract 55 from 147 and subtract 147 from 239 and compare the two numbers:
147 - 55 = 92
239 - 147 = 92
As you can see, the halfway number is 92 higher than 55 and 92 lower than 239. Therefore, our halfway between answer of 147 above is correct.
Halfway Between
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Halfway Between 55 and 240
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