When you ask "What number is halfway between 87 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=87 and Y=239.
To find the number halfway between 87 and 239, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 239 into our formula, we get:
(87 + 239)/2 = 163
Thus, the number halfway between 87 and 239 is 163.
To check that our answer is correct, we subtract 87 from 163 and subtract 163 from 239 and compare the two numbers:
163 - 87 = 76
239 - 163 = 76
As you can see, the halfway number is 76 higher than 87 and 76 lower than 239. Therefore, our halfway between answer of 163 above is correct.
Halfway Between
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Halfway Between 87 and 240
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