When you ask "What number is halfway between 11 and 824?" 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=824.
To find the number halfway between 11 and 824, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 824 into our formula, we get:
(11 + 824)/2 = 417.5
Thus, the number halfway between 11 and 824 is 417.5.
To check that our answer is correct, we subtract 11 from 417.5 and subtract 417.5 from 824 and compare the two numbers:
417.5 - 11 = 406.5
824 - 417.5 = 406.5
As you can see, the halfway number is 406.5 higher than 11 and 406.5 lower than 824. Therefore, our halfway between answer of 417.5 above is correct.
Halfway Between
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Halfway Between 11 and 825
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