When you ask "What number is halfway between 24 and 489?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=24 and Y=489.
To find the number halfway between 24 and 489, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 24 and 489 into our formula, we get:
(24 + 489)/2 = 256.5
Thus, the number halfway between 24 and 489 is 256.5.
To check that our answer is correct, we subtract 24 from 256.5 and subtract 256.5 from 489 and compare the two numbers:
256.5 - 24 = 232.5
489 - 256.5 = 232.5
As you can see, the halfway number is 232.5 higher than 24 and 232.5 lower than 489. Therefore, our halfway between answer of 256.5 above is correct.
Halfway Between
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Halfway Between 24 and 490
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