When you ask "What number is halfway between 20 and 755?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=755.
To find the number halfway between 20 and 755, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 755 into our formula, we get:
(20 + 755)/2 = 387.5
Thus, the number halfway between 20 and 755 is 387.5.
To check that our answer is correct, we subtract 20 from 387.5 and subtract 387.5 from 755 and compare the two numbers:
387.5 - 20 = 367.5
755 - 387.5 = 367.5
As you can see, the halfway number is 367.5 higher than 20 and 367.5 lower than 755. Therefore, our halfway between answer of 387.5 above is correct.
Halfway Between
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Halfway Between 20 and 756
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