When you ask "What number is halfway between 68 and 491?" 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=491.
To find the number halfway between 68 and 491, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 68 and 491 into our formula, we get:
(68 + 491)/2 = 279.5
Thus, the number halfway between 68 and 491 is 279.5.
To check that our answer is correct, we subtract 68 from 279.5 and subtract 279.5 from 491 and compare the two numbers:
279.5 - 68 = 211.5
491 - 279.5 = 211.5
As you can see, the halfway number is 211.5 higher than 68 and 211.5 lower than 491. Therefore, our halfway between answer of 279.5 above is correct.
Halfway Between
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Halfway Between 68 and 492
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