When you ask "What number is halfway between 83 and 490?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=83 and Y=490.
To find the number halfway between 83 and 490, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 83 and 490 into our formula, we get:
(83 + 490)/2 = 286.5
Thus, the number halfway between 83 and 490 is 286.5.
To check that our answer is correct, we subtract 83 from 286.5 and subtract 286.5 from 490 and compare the two numbers:
286.5 - 83 = 203.5
490 - 286.5 = 203.5
As you can see, the halfway number is 203.5 higher than 83 and 203.5 lower than 490. Therefore, our halfway between answer of 286.5 above is correct.
Halfway Between
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Halfway Between 83 and 491
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