When you ask "What number is halfway between 84 and 897?" 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=897.
To find the number halfway between 84 and 897, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 84 and 897 into our formula, we get:
(84 + 897)/2 = 490.5
Thus, the number halfway between 84 and 897 is 490.5.
To check that our answer is correct, we subtract 84 from 490.5 and subtract 490.5 from 897 and compare the two numbers:
490.5 - 84 = 406.5
897 - 490.5 = 406.5
As you can see, the halfway number is 406.5 higher than 84 and 406.5 lower than 897. Therefore, our halfway between answer of 490.5 above is correct.
Halfway Between
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Halfway Between 84 and 898
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