When you ask "What number is halfway between 80 and 231?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=80 and Y=231.
To find the number halfway between 80 and 231, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 80 and 231 into our formula, we get:
(80 + 231)/2 = 155.5
Thus, the number halfway between 80 and 231 is 155.5.
To check that our answer is correct, we subtract 80 from 155.5 and subtract 155.5 from 231 and compare the two numbers:
155.5 - 80 = 75.5
231 - 155.5 = 75.5
As you can see, the halfway number is 75.5 higher than 80 and 75.5 lower than 231. Therefore, our halfway between answer of 155.5 above is correct.
Halfway Between
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Halfway Between 80 and 232
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