When you ask "What number is halfway between 81 and 252?" 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=252.
To find the number halfway between 81 and 252, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 252 into our formula, we get:
(81 + 252)/2 = 166.5
Thus, the number halfway between 81 and 252 is 166.5.
To check that our answer is correct, we subtract 81 from 166.5 and subtract 166.5 from 252 and compare the two numbers:
166.5 - 81 = 85.5
252 - 166.5 = 85.5
As you can see, the halfway number is 85.5 higher than 81 and 85.5 lower than 252. Therefore, our halfway between answer of 166.5 above is correct.
Halfway Between
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Halfway Between 81 and 253
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