When you ask "What number is halfway between 69 and 512?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=69 and Y=512.
To find the number halfway between 69 and 512, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 512 into our formula, we get:
(69 + 512)/2 = 290.5
Thus, the number halfway between 69 and 512 is 290.5.
To check that our answer is correct, we subtract 69 from 290.5 and subtract 290.5 from 512 and compare the two numbers:
290.5 - 69 = 221.5
512 - 290.5 = 221.5
As you can see, the halfway number is 221.5 higher than 69 and 221.5 lower than 512. Therefore, our halfway between answer of 290.5 above is correct.
Halfway Between
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Halfway Between 69 and 513
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