When you ask "What number is halfway between 84 and 673?" 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=673.
To find the number halfway between 84 and 673, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 673 into our formula, we get:
(84 + 673)/2 = 378.5
Thus, the number halfway between 84 and 673 is 378.5.
To check that our answer is correct, we subtract 84 from 378.5 and subtract 378.5 from 673 and compare the two numbers:
378.5 - 84 = 294.5
673 - 378.5 = 294.5
As you can see, the halfway number is 294.5 higher than 84 and 294.5 lower than 673. Therefore, our halfway between answer of 378.5 above is correct.
Halfway Between
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Halfway Between 84 and 674
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