When you ask "What number is halfway between 11 and 788?" 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=788.
To find the number halfway between 11 and 788, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 788 into our formula, we get:
(11 + 788)/2 = 399.5
Thus, the number halfway between 11 and 788 is 399.5.
To check that our answer is correct, we subtract 11 from 399.5 and subtract 399.5 from 788 and compare the two numbers:
399.5 - 11 = 388.5
788 - 399.5 = 388.5
As you can see, the halfway number is 388.5 higher than 11 and 388.5 lower than 788. Therefore, our halfway between answer of 399.5 above is correct.
Halfway Between
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