When you ask "What number is halfway between 81 and 240?" 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=240.
To find the number halfway between 81 and 240, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 81 and 240 into our formula, we get:
(81 + 240)/2 = 160.5
Thus, the number halfway between 81 and 240 is 160.5.
To check that our answer is correct, we subtract 81 from 160.5 and subtract 160.5 from 240 and compare the two numbers:
160.5 - 81 = 79.5
240 - 160.5 = 79.5
As you can see, the halfway number is 79.5 higher than 81 and 79.5 lower than 240. Therefore, our halfway between answer of 160.5 above is correct.
Halfway Between
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Halfway Between 81 and 241
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