When you ask "What number is halfway between 39 and 251?" 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=251.
To find the number halfway between 39 and 251, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 251 into our formula, we get:
(39 + 251)/2 = 145
Thus, the number halfway between 39 and 251 is 145.
To check that our answer is correct, we subtract 39 from 145 and subtract 145 from 251 and compare the two numbers:
145 - 39 = 106
251 - 145 = 106
As you can see, the halfway number is 106 higher than 39 and 106 lower than 251. Therefore, our halfway between answer of 145 above is correct.
Halfway Between
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Halfway Between 39 and 252
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