When you ask "What number is halfway between 84 and 772?" 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=772.
To find the number halfway between 84 and 772, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 772 into our formula, we get:
(84 + 772)/2 = 428
Thus, the number halfway between 84 and 772 is 428.
To check that our answer is correct, we subtract 84 from 428 and subtract 428 from 772 and compare the two numbers:
428 - 84 = 344
772 - 428 = 344
As you can see, the halfway number is 344 higher than 84 and 344 lower than 772. Therefore, our halfway between answer of 428 above is correct.
Halfway Between
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Halfway Between 84 and 773
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