When you ask "What number is halfway between 18 and 793?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=18 and Y=793.
To find the number halfway between 18 and 793, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 793 into our formula, we get:
(18 + 793)/2 = 405.5
Thus, the number halfway between 18 and 793 is 405.5.
To check that our answer is correct, we subtract 18 from 405.5 and subtract 405.5 from 793 and compare the two numbers:
405.5 - 18 = 387.5
793 - 405.5 = 387.5
As you can see, the halfway number is 387.5 higher than 18 and 387.5 lower than 793. Therefore, our halfway between answer of 405.5 above is correct.
Halfway Between
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Halfway Between 18 and 794
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