When you ask "What number is halfway between 11 and 720?" 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=720.
To find the number halfway between 11 and 720, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 720 into our formula, we get:
(11 + 720)/2 = 365.5
Thus, the number halfway between 11 and 720 is 365.5.
To check that our answer is correct, we subtract 11 from 365.5 and subtract 365.5 from 720 and compare the two numbers:
365.5 - 11 = 354.5
720 - 365.5 = 354.5
As you can see, the halfway number is 354.5 higher than 11 and 354.5 lower than 720. Therefore, our halfway between answer of 365.5 above is correct.
Halfway Between
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