When you ask "What number is halfway between 40 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=40 and Y=239.
To find the number halfway between 40 and 239, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 40 and 239 into our formula, we get:
(40 + 239)/2 = 139.5
Thus, the number halfway between 40 and 239 is 139.5.
To check that our answer is correct, we subtract 40 from 139.5 and subtract 139.5 from 239 and compare the two numbers:
139.5 - 40 = 99.5
239 - 139.5 = 99.5
As you can see, the halfway number is 99.5 higher than 40 and 99.5 lower than 239. Therefore, our halfway between answer of 139.5 above is correct.
Halfway Between
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Halfway Between 40 and 240
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