When you ask "What number is halfway between 84 and 680?" 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=680.
To find the number halfway between 84 and 680, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 680 into our formula, we get:
(84 + 680)/2 = 382
Thus, the number halfway between 84 and 680 is 382.
To check that our answer is correct, we subtract 84 from 382 and subtract 382 from 680 and compare the two numbers:
382 - 84 = 298
680 - 382 = 298
As you can see, the halfway number is 298 higher than 84 and 298 lower than 680. Therefore, our halfway between answer of 382 above is correct.
Halfway Between
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