When you ask "What number is halfway between 16 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=16 and Y=991.
To find the number halfway between 16 and 991, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 16 and 991 into our formula, we get:
(16 + 991)/2 = 503.5
Thus, the number halfway between 16 and 991 is 503.5.
To check that our answer is correct, we subtract 16 from 503.5 and subtract 503.5 from 991 and compare the two numbers:
503.5 - 16 = 487.5
991 - 503.5 = 487.5
As you can see, the halfway number is 487.5 higher than 16 and 487.5 lower than 991. Therefore, our halfway between answer of 503.5 above is correct.
Halfway Between
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Halfway Between 16 and 992
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