When you ask "What number is halfway between 3 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=3 and Y=490.
To find the number halfway between 3 and 490, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 490 into our formula, we get:
(3 + 490)/2 = 246.5
Thus, the number halfway between 3 and 490 is 246.5.
To check that our answer is correct, we subtract 3 from 246.5 and subtract 246.5 from 490 and compare the two numbers:
246.5 - 3 = 243.5
490 - 246.5 = 243.5
As you can see, the halfway number is 243.5 higher than 3 and 243.5 lower than 490. Therefore, our halfway between answer of 246.5 above is correct.
Halfway Between
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Halfway Between 3 and 491
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