When you ask "What number is halfway between 82 and 691?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=82 and Y=691.
To find the number halfway between 82 and 691, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 82 and 691 into our formula, we get:
(82 + 691)/2 = 386.5
Thus, the number halfway between 82 and 691 is 386.5.
To check that our answer is correct, we subtract 82 from 386.5 and subtract 386.5 from 691 and compare the two numbers:
386.5 - 82 = 304.5
691 - 386.5 = 304.5
As you can see, the halfway number is 304.5 higher than 82 and 304.5 lower than 691. Therefore, our halfway between answer of 386.5 above is correct.
Halfway Between
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Halfway Between 82 and 692
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