When you ask "What number is halfway between 58 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=58 and Y=489.
To find the number halfway between 58 and 489, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 58 and 489 into our formula, we get:
(58 + 489)/2 = 273.5
Thus, the number halfway between 58 and 489 is 273.5.
To check that our answer is correct, we subtract 58 from 273.5 and subtract 273.5 from 489 and compare the two numbers:
273.5 - 58 = 215.5
489 - 273.5 = 215.5
As you can see, the halfway number is 215.5 higher than 58 and 215.5 lower than 489. Therefore, our halfway between answer of 273.5 above is correct.
Halfway Between
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Halfway Between 58 and 490
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