When you ask "What number is halfway between 9 and 58?" 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=58.
To find the number halfway between 9 and 58, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 58 into our formula, we get:
(9 + 58)/2 = 33.5
Thus, the number halfway between 9 and 58 is 33.5.
To check that our answer is correct, we subtract 9 from 33.5 and subtract 33.5 from 58 and compare the two numbers:
33.5 - 9 = 24.5
58 - 33.5 = 24.5
As you can see, the halfway number is 24.5 higher than 9 and 24.5 lower than 58. Therefore, our halfway between answer of 33.5 above is correct.
Halfway Between
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Halfway Between 9 and 59
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