When you ask "What number is halfway between 12 and 903?" 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=903.
To find the number halfway between 12 and 903, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 903 into our formula, we get:
(12 + 903)/2 = 457.5
Thus, the number halfway between 12 and 903 is 457.5.
To check that our answer is correct, we subtract 12 from 457.5 and subtract 457.5 from 903 and compare the two numbers:
457.5 - 12 = 445.5
903 - 457.5 = 445.5
As you can see, the halfway number is 445.5 higher than 12 and 445.5 lower than 903. Therefore, our halfway between answer of 457.5 above is correct.
Halfway Between
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Halfway Between 12 and 904
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