When you ask "What number is halfway between 30 and 765?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=30 and Y=765.
To find the number halfway between 30 and 765, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 765 into our formula, we get:
(30 + 765)/2 = 397.5
Thus, the number halfway between 30 and 765 is 397.5.
To check that our answer is correct, we subtract 30 from 397.5 and subtract 397.5 from 765 and compare the two numbers:
397.5 - 30 = 367.5
765 - 397.5 = 367.5
As you can see, the halfway number is 367.5 higher than 30 and 367.5 lower than 765. Therefore, our halfway between answer of 397.5 above is correct.
Halfway Between
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Halfway Between 30 and 766
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