When you ask "What number is halfway between 84 and 311?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=84 and Y=311.
To find the number halfway between 84 and 311, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 311 into our formula, we get:
(84 + 311)/2 = 197.5
Thus, the number halfway between 84 and 311 is 197.5.
To check that our answer is correct, we subtract 84 from 197.5 and subtract 197.5 from 311 and compare the two numbers:
197.5 - 84 = 113.5
311 - 197.5 = 113.5
As you can see, the halfway number is 113.5 higher than 84 and 113.5 lower than 311. Therefore, our halfway between answer of 197.5 above is correct.
Halfway Between
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Halfway Between 84 and 312
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