When you ask "What number is halfway between 23 and 780?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=23 and Y=780.
To find the number halfway between 23 and 780, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 780 into our formula, we get:
(23 + 780)/2 = 401.5
Thus, the number halfway between 23 and 780 is 401.5.
To check that our answer is correct, we subtract 23 from 401.5 and subtract 401.5 from 780 and compare the two numbers:
401.5 - 23 = 378.5
780 - 401.5 = 378.5
As you can see, the halfway number is 378.5 higher than 23 and 378.5 lower than 780. Therefore, our halfway between answer of 401.5 above is correct.
Halfway Between
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