When you ask "What number is halfway between 28 and 989?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=28 and Y=989.
To find the number halfway between 28 and 989, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 989 into our formula, we get:
(28 + 989)/2 = 508.5
Thus, the number halfway between 28 and 989 is 508.5.
To check that our answer is correct, we subtract 28 from 508.5 and subtract 508.5 from 989 and compare the two numbers:
508.5 - 28 = 480.5
989 - 508.5 = 480.5
As you can see, the halfway number is 480.5 higher than 28 and 480.5 lower than 989. Therefore, our halfway between answer of 508.5 above is correct.
Halfway Between
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Halfway Between 28 and 990
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