When you ask "What number is halfway between 64 and 517?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=64 and Y=517.
To find the number halfway between 64 and 517, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 64 and 517 into our formula, we get:
(64 + 517)/2 = 290.5
Thus, the number halfway between 64 and 517 is 290.5.
To check that our answer is correct, we subtract 64 from 290.5 and subtract 290.5 from 517 and compare the two numbers:
290.5 - 64 = 226.5
517 - 290.5 = 226.5
As you can see, the halfway number is 226.5 higher than 64 and 226.5 lower than 517. Therefore, our halfway between answer of 290.5 above is correct.
Halfway Between
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Halfway Between 64 and 518
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