When you ask "What number is halfway between 12 and 663?" 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=663.
To find the number halfway between 12 and 663, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 663 into our formula, we get:
(12 + 663)/2 = 337.5
Thus, the number halfway between 12 and 663 is 337.5.
To check that our answer is correct, we subtract 12 from 337.5 and subtract 337.5 from 663 and compare the two numbers:
337.5 - 12 = 325.5
663 - 337.5 = 325.5
As you can see, the halfway number is 325.5 higher than 12 and 325.5 lower than 663. Therefore, our halfway between answer of 337.5 above is correct.
Halfway Between
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Halfway Between 12 and 664
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