When you ask "What number is halfway between 11 and 790?" 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=790.
To find the number halfway between 11 and 790, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 790 into our formula, we get:
(11 + 790)/2 = 400.5
Thus, the number halfway between 11 and 790 is 400.5.
To check that our answer is correct, we subtract 11 from 400.5 and subtract 400.5 from 790 and compare the two numbers:
400.5 - 11 = 389.5
790 - 400.5 = 389.5
As you can see, the halfway number is 389.5 higher than 11 and 389.5 lower than 790. Therefore, our halfway between answer of 400.5 above is correct.
Halfway Between
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Halfway Between 11 and 791
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