When you ask "What number is halfway between 9 and 36?" 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=36.
To find the number halfway between 9 and 36, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 36 into our formula, we get:
(9 + 36)/2 = 22.5
Thus, the number halfway between 9 and 36 is 22.5.
To check that our answer is correct, we subtract 9 from 22.5 and subtract 22.5 from 36 and compare the two numbers:
22.5 - 9 = 13.5
36 - 22.5 = 13.5
As you can see, the halfway number is 13.5 higher than 9 and 13.5 lower than 36. Therefore, our halfway between answer of 22.5 above is correct.
Halfway Between
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Halfway Between 9 and 37
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