When you ask "What number is halfway between 80 and 291?" 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=291.
To find the number halfway between 80 and 291, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 80 and 291 into our formula, we get:
(80 + 291)/2 = 185.5
Thus, the number halfway between 80 and 291 is 185.5.
To check that our answer is correct, we subtract 80 from 185.5 and subtract 185.5 from 291 and compare the two numbers:
185.5 - 80 = 105.5
291 - 185.5 = 105.5
As you can see, the halfway number is 105.5 higher than 80 and 105.5 lower than 291. Therefore, our halfway between answer of 185.5 above is correct.
Halfway Between
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Halfway Between 80 and 292
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