When you ask "What number is halfway between 39 and 140?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=39 and Y=140.
To find the number halfway between 39 and 140, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 140 into our formula, we get:
(39 + 140)/2 = 89.5
Thus, the number halfway between 39 and 140 is 89.5.
To check that our answer is correct, we subtract 39 from 89.5 and subtract 89.5 from 140 and compare the two numbers:
89.5 - 39 = 50.5
140 - 89.5 = 50.5
As you can see, the halfway number is 50.5 higher than 39 and 50.5 lower than 140. Therefore, our halfway between answer of 89.5 above is correct.
Halfway Between
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Halfway Between 39 and 141
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