When you ask "What number is halfway between 87 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=87 and Y=897.
To find the number halfway between 87 and 897, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 897 into our formula, we get:
(87 + 897)/2 = 492
Thus, the number halfway between 87 and 897 is 492.
To check that our answer is correct, we subtract 87 from 492 and subtract 492 from 897 and compare the two numbers:
492 - 87 = 405
897 - 492 = 405
As you can see, the halfway number is 405 higher than 87 and 405 lower than 897. Therefore, our halfway between answer of 492 above is correct.
Halfway Between
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Halfway Between 87 and 898
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