When you ask "What number is halfway between 81 and 201?" 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=201.
To find the number halfway between 81 and 201, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 201 into our formula, we get:
(81 + 201)/2 = 141
Thus, the number halfway between 81 and 201 is 141.
To check that our answer is correct, we subtract 81 from 141 and subtract 141 from 201 and compare the two numbers:
141 - 81 = 60
201 - 141 = 60
As you can see, the halfway number is 60 higher than 81 and 60 lower than 201. Therefore, our halfway between answer of 141 above is correct.
Halfway Between
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Halfway Between 81 and 202
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