When you ask "What number is halfway between 81 and 270?" 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=270.
To find the number halfway between 81 and 270, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 270 into our formula, we get:
(81 + 270)/2 = 175.5
Thus, the number halfway between 81 and 270 is 175.5.
To check that our answer is correct, we subtract 81 from 175.5 and subtract 175.5 from 270 and compare the two numbers:
175.5 - 81 = 94.5
270 - 175.5 = 94.5
As you can see, the halfway number is 94.5 higher than 81 and 94.5 lower than 270. Therefore, our halfway between answer of 175.5 above is correct.
Halfway Between
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Halfway Between 81 and 271
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