When you ask "What number is halfway between 15 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=15 and Y=239.
To find the number halfway between 15 and 239, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 15 and 239 into our formula, we get:
(15 + 239)/2 = 127
Thus, the number halfway between 15 and 239 is 127.
To check that our answer is correct, we subtract 15 from 127 and subtract 127 from 239 and compare the two numbers:
127 - 15 = 112
239 - 127 = 112
As you can see, the halfway number is 112 higher than 15 and 112 lower than 239. Therefore, our halfway between answer of 127 above is correct.
Halfway Between
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Halfway Between 15 and 240
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