When you ask "What number is halfway between 84 and 331?" 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=331.
To find the number halfway between 84 and 331, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 331 into our formula, we get:
(84 + 331)/2 = 207.5
Thus, the number halfway between 84 and 331 is 207.5.
To check that our answer is correct, we subtract 84 from 207.5 and subtract 207.5 from 331 and compare the two numbers:
207.5 - 84 = 123.5
331 - 207.5 = 123.5
As you can see, the halfway number is 123.5 higher than 84 and 123.5 lower than 331. Therefore, our halfway between answer of 207.5 above is correct.
Halfway Between
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Halfway Between 84 and 332
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