When you ask "What number is halfway between 68 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=68 and Y=490.
To find the number halfway between 68 and 490, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 490 into our formula, we get:
(68 + 490)/2 = 279
Thus, the number halfway between 68 and 490 is 279.
To check that our answer is correct, we subtract 68 from 279 and subtract 279 from 490 and compare the two numbers:
279 - 68 = 211
490 - 279 = 211
As you can see, the halfway number is 211 higher than 68 and 211 lower than 490. Therefore, our halfway between answer of 279 above is correct.
Halfway Between
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Halfway Between 68 and 491
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