
When you ask "What number is halfway between 11 and 616?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=11 and Y=616.

To find the number halfway between 11 and 616, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 616 into our formula, we get:
(11 + 616)/2 = 313.5
Thus, the number halfway between 11 and 616 is 313.5.
To check that our answer is correct, we subtract 11 from 313.5 and subtract 313.5 from 616 and compare the two numbers:
313.5 - 11 = 302.5
616 - 313.5 = 302.5
As you can see, the halfway number is 302.5 higher than 11 and 302.5 lower than 616. Therefore, our halfway between answer of 313.5 above is correct.
Halfway Between
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Halfway Between 11 and 617
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