When you ask "What number is halfway between 63 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=63 and Y=489.
To find the number halfway between 63 and 489, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 63 and 489 into our formula, we get:
(63 + 489)/2 = 276
Thus, the number halfway between 63 and 489 is 276.
To check that our answer is correct, we subtract 63 from 276 and subtract 276 from 489 and compare the two numbers:
276 - 63 = 213
489 - 276 = 213
As you can see, the halfway number is 213 higher than 63 and 213 lower than 489. Therefore, our halfway between answer of 276 above is correct.
Halfway Between
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Halfway Between 63 and 490
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