When you ask "What number is halfway between 49 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=49 and Y=490.
To find the number halfway between 49 and 490, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 49 and 490 into our formula, we get:
(49 + 490)/2 = 269.5
Thus, the number halfway between 49 and 490 is 269.5.
To check that our answer is correct, we subtract 49 from 269.5 and subtract 269.5 from 490 and compare the two numbers:
269.5 - 49 = 220.5
490 - 269.5 = 220.5
As you can see, the halfway number is 220.5 higher than 49 and 220.5 lower than 490. Therefore, our halfway between answer of 269.5 above is correct.
Halfway Between
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Halfway Between 49 and 491
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