When you ask "What number is halfway between 9 and 32?" 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=32.
To find the number halfway between 9 and 32, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 32 into our formula, we get:
(9 + 32)/2 = 20.5
Thus, the number halfway between 9 and 32 is 20.5.
To check that our answer is correct, we subtract 9 from 20.5 and subtract 20.5 from 32 and compare the two numbers:
20.5 - 9 = 11.5
32 - 20.5 = 11.5
As you can see, the halfway number is 11.5 higher than 9 and 11.5 lower than 32. Therefore, our halfway between answer of 20.5 above is correct.
Halfway Between
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Halfway Between 9 and 33
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