When you ask "What number is halfway between 0 and 991?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=0 and Y=991.
To find the number halfway between 0 and 991, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 0 and 991 into our formula, we get:
(0 + 991)/2 = 495.5
Thus, the number halfway between 0 and 991 is 495.5.
To check that our answer is correct, we subtract 0 from 495.5 and subtract 495.5 from 991 and compare the two numbers:
495.5 - 0 = 495.5
991 - 495.5 = 495.5
As you can see, the halfway number is 495.5 higher than 0 and 495.5 lower than 991. Therefore, our halfway between answer of 495.5 above is correct.
Halfway Between
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Halfway Between 0 and 992
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