When you ask "What number is halfway between 69 and 664?" 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=664.
To find the number halfway between 69 and 664, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 69 and 664 into our formula, we get:
(69 + 664)/2 = 366.5
Thus, the number halfway between 69 and 664 is 366.5.
To check that our answer is correct, we subtract 69 from 366.5 and subtract 366.5 from 664 and compare the two numbers:
366.5 - 69 = 297.5
664 - 366.5 = 297.5
As you can see, the halfway number is 297.5 higher than 69 and 297.5 lower than 664. Therefore, our halfway between answer of 366.5 above is correct.
Halfway Between
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Halfway Between 69 and 665
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