When you ask "What number is halfway between 47 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=47 and Y=490.
To find the number halfway between 47 and 490, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 47 and 490 into our formula, we get:
(47 + 490)/2 = 268.5
Thus, the number halfway between 47 and 490 is 268.5.
To check that our answer is correct, we subtract 47 from 268.5 and subtract 268.5 from 490 and compare the two numbers:
268.5 - 47 = 221.5
490 - 268.5 = 221.5
As you can see, the halfway number is 221.5 higher than 47 and 221.5 lower than 490. Therefore, our halfway between answer of 268.5 above is correct.
Halfway Between
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Halfway Between 47 and 491
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