When you ask "What number is halfway between 80 and 151?" 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=151.
To find the number halfway between 80 and 151, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 80 and 151 into our formula, we get:
(80 + 151)/2 = 115.5
Thus, the number halfway between 80 and 151 is 115.5.
To check that our answer is correct, we subtract 80 from 115.5 and subtract 115.5 from 151 and compare the two numbers:
115.5 - 80 = 35.5
151 - 115.5 = 35.5
As you can see, the halfway number is 35.5 higher than 80 and 35.5 lower than 151. Therefore, our halfway between answer of 115.5 above is correct.
Halfway Between
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Halfway Between 80 and 152
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