When you ask "What number is halfway between 30 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=30 and Y=589.
To find the number halfway between 30 and 589, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 589 into our formula, we get:
(30 + 589)/2 = 309.5
Thus, the number halfway between 30 and 589 is 309.5.
To check that our answer is correct, we subtract 30 from 309.5 and subtract 309.5 from 589 and compare the two numbers:
309.5 - 30 = 279.5
589 - 309.5 = 279.5
As you can see, the halfway number is 279.5 higher than 30 and 279.5 lower than 589. Therefore, our halfway between answer of 309.5 above is correct.
Halfway Between
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Halfway Between 30 and 590
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