When you ask "What number is halfway between 87 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=87 and Y=589.
To find the number halfway between 87 and 589, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 589 into our formula, we get:
(87 + 589)/2 = 338
Thus, the number halfway between 87 and 589 is 338.
To check that our answer is correct, we subtract 87 from 338 and subtract 338 from 589 and compare the two numbers:
338 - 87 = 251
589 - 338 = 251
As you can see, the halfway number is 251 higher than 87 and 251 lower than 589. Therefore, our halfway between answer of 338 above is correct.
Halfway Between
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Halfway Between 87 and 590
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