When you ask "What number is halfway between 99 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=99 and Y=589.
To find the number halfway between 99 and 589, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 99 and 589 into our formula, we get:
(99 + 589)/2 = 344
Thus, the number halfway between 99 and 589 is 344.
To check that our answer is correct, we subtract 99 from 344 and subtract 344 from 589 and compare the two numbers:
344 - 99 = 245
589 - 344 = 245
As you can see, the halfway number is 245 higher than 99 and 245 lower than 589. Therefore, our halfway between answer of 344 above is correct.
Halfway Between
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Halfway Between 99 and 590
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