When you ask "What number is halfway between 78 and 589?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=78 and Y=589.
To find the number halfway between 78 and 589, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 78 and 589 into our formula, we get:
(78 + 589)/2 = 333.5
Thus, the number halfway between 78 and 589 is 333.5.
To check that our answer is correct, we subtract 78 from 333.5 and subtract 333.5 from 589 and compare the two numbers:
333.5 - 78 = 255.5
589 - 333.5 = 255.5
As you can see, the halfway number is 255.5 higher than 78 and 255.5 lower than 589. Therefore, our halfway between answer of 333.5 above is correct.
Halfway Between
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Halfway Between 78 and 590
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