When you ask "What number is halfway between 12 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=12 and Y=897.
To find the number halfway between 12 and 897, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 897 into our formula, we get:
(12 + 897)/2 = 454.5
Thus, the number halfway between 12 and 897 is 454.5.
To check that our answer is correct, we subtract 12 from 454.5 and subtract 454.5 from 897 and compare the two numbers:
454.5 - 12 = 442.5
897 - 454.5 = 442.5
As you can see, the halfway number is 442.5 higher than 12 and 442.5 lower than 897. Therefore, our halfway between answer of 454.5 above is correct.
Halfway Between
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Halfway Between 12 and 898
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