When you ask "What number is halfway between 82 and 321?" 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=321.
To find the number halfway between 82 and 321, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 82 and 321 into our formula, we get:
(82 + 321)/2 = 201.5
Thus, the number halfway between 82 and 321 is 201.5.
To check that our answer is correct, we subtract 82 from 201.5 and subtract 201.5 from 321 and compare the two numbers:
201.5 - 82 = 119.5
321 - 201.5 = 119.5
As you can see, the halfway number is 119.5 higher than 82 and 119.5 lower than 321. Therefore, our halfway between answer of 201.5 above is correct.
Halfway Between
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Halfway Between 82 and 322
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