When you ask "What number is halfway between 39 and 143?" 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=143.
To find the number halfway between 39 and 143, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 39 and 143 into our formula, we get:
(39 + 143)/2 = 91
Thus, the number halfway between 39 and 143 is 91.
To check that our answer is correct, we subtract 39 from 91 and subtract 91 from 143 and compare the two numbers:
91 - 39 = 52
143 - 91 = 52
As you can see, the halfway number is 52 higher than 39 and 52 lower than 143. Therefore, our halfway between answer of 91 above is correct.
Halfway Between
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Halfway Between 39 and 144
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