When you ask "What number is halfway between 11 and 838?" 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=838.
To find the number halfway between 11 and 838, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 838 into our formula, we get:
(11 + 838)/2 = 424.5
Thus, the number halfway between 11 and 838 is 424.5.
To check that our answer is correct, we subtract 11 from 424.5 and subtract 424.5 from 838 and compare the two numbers:
424.5 - 11 = 413.5
838 - 424.5 = 413.5
As you can see, the halfway number is 413.5 higher than 11 and 413.5 lower than 838. Therefore, our halfway between answer of 424.5 above is correct.
Halfway Between
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Halfway Between 11 and 839
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