When you ask "What number is halfway between 56 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=56 and Y=489.
To find the number halfway between 56 and 489, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 56 and 489 into our formula, we get:
(56 + 489)/2 = 272.5
Thus, the number halfway between 56 and 489 is 272.5.
To check that our answer is correct, we subtract 56 from 272.5 and subtract 272.5 from 489 and compare the two numbers:
272.5 - 56 = 216.5
489 - 272.5 = 216.5
As you can see, the halfway number is 216.5 higher than 56 and 216.5 lower than 489. Therefore, our halfway between answer of 272.5 above is correct.
Halfway Between
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Halfway Between 56 and 490
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