When you ask "What number is halfway between 91 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=91 and Y=491.
To find the number halfway between 91 and 491, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 91 and 491 into our formula, we get:
(91 + 491)/2 = 291
Thus, the number halfway between 91 and 491 is 291.
To check that our answer is correct, we subtract 91 from 291 and subtract 291 from 491 and compare the two numbers:
291 - 91 = 200
491 - 291 = 200
As you can see, the halfway number is 200 higher than 91 and 200 lower than 491. Therefore, our halfway between answer of 291 above is correct.
Halfway Between
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Halfway Between 91 and 492
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