Halfway Between 9 and 30

When you ask "What number is halfway between 9 and 30?" 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=30.

Halfway Between Line

To find the number halfway between 9 and 30, we use the following formula:

(X + Y)/2 = Halfway Between

When we enter 9 and 30 into our formula, we get:

(9 + 30)/2 = 19.5

Thus, the number halfway between 9 and 30 is 19.5.

To check that our answer is correct, we subtract 9 from 19.5 and subtract 19.5 from 30 and compare the two numbers:

19.5 - 9 = 10.5
30 - 19.5 = 10.5

As you can see, the halfway number is 10.5 higher than 9 and 10.5 lower than 30. Therefore, our halfway between answer of 19.5 above is correct.

Halfway Between
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Halfway Between 9 and 31
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