When you ask "What number is halfway between 50 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=50 and Y=489.
To find the number halfway between 50 and 489, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 50 and 489 into our formula, we get:
(50 + 489)/2 = 269.5
Thus, the number halfway between 50 and 489 is 269.5.
To check that our answer is correct, we subtract 50 from 269.5 and subtract 269.5 from 489 and compare the two numbers:
269.5 - 50 = 219.5
489 - 269.5 = 219.5
As you can see, the halfway number is 219.5 higher than 50 and 219.5 lower than 489. Therefore, our halfway between answer of 269.5 above is correct.
Halfway Between
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Halfway Between 50 and 490
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