When you ask "What number is halfway between 22 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=22 and Y=489.
To find the number halfway between 22 and 489, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 22 and 489 into our formula, we get:
(22 + 489)/2 = 255.5
Thus, the number halfway between 22 and 489 is 255.5.
To check that our answer is correct, we subtract 22 from 255.5 and subtract 255.5 from 489 and compare the two numbers:
255.5 - 22 = 233.5
489 - 255.5 = 233.5
As you can see, the halfway number is 233.5 higher than 22 and 233.5 lower than 489. Therefore, our halfway between answer of 255.5 above is correct.
Halfway Between
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Halfway Between 22 and 490
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