When you ask "What number is halfway between 81 and 322?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=81 and Y=322.
To find the number halfway between 81 and 322, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 322 into our formula, we get:
(81 + 322)/2 = 201.5
Thus, the number halfway between 81 and 322 is 201.5.
To check that our answer is correct, we subtract 81 from 201.5 and subtract 201.5 from 322 and compare the two numbers:
201.5 - 81 = 120.5
322 - 201.5 = 120.5
As you can see, the halfway number is 120.5 higher than 81 and 120.5 lower than 322. Therefore, our halfway between answer of 201.5 above is correct.
Halfway Between
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Halfway Between 81 and 323
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