When you ask "What number is halfway between 11 and 667?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=11 and Y=667.
To find the number halfway between 11 and 667, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 11 and 667 into our formula, we get:
(11 + 667)/2 = 339
Thus, the number halfway between 11 and 667 is 339.
To check that our answer is correct, we subtract 11 from 339 and subtract 339 from 667 and compare the two numbers:
339 - 11 = 328
667 - 339 = 328
As you can see, the halfway number is 328 higher than 11 and 328 lower than 667. Therefore, our halfway between answer of 339 above is correct.
Halfway Between
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Halfway Between 11 and 668
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