
When you ask "What number is halfway between 9 and 67?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=9 and Y=67.

To find the number halfway between 9 and 67, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 67 into our formula, we get:
(9 + 67)/2 = 38
Thus, the number halfway between 9 and 67 is 38.
To check that our answer is correct, we subtract 9 from 38 and subtract 38 from 67 and compare the two numbers:
38 - 9 = 29
67 - 38 = 29
As you can see, the halfway number is 29 higher than 9 and 29 lower than 67. Therefore, our halfway between answer of 38 above is correct.
Halfway Between
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Halfway Between 9 and 68
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