When you ask "What number is halfway between 11 and 842?" 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=842.
To find the number halfway between 11 and 842, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 842 into our formula, we get:
(11 + 842)/2 = 426.5
Thus, the number halfway between 11 and 842 is 426.5.
To check that our answer is correct, we subtract 11 from 426.5 and subtract 426.5 from 842 and compare the two numbers:
426.5 - 11 = 415.5
842 - 426.5 = 415.5
As you can see, the halfway number is 415.5 higher than 11 and 415.5 lower than 842. Therefore, our halfway between answer of 426.5 above is correct.
Halfway Between
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Halfway Between 11 and 843
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