When you ask "What number is halfway between 18 and 59?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=18 and Y=59.
To find the number halfway between 18 and 59, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 59 into our formula, we get:
(18 + 59)/2 = 38.5
Thus, the number halfway between 18 and 59 is 38.5.
To check that our answer is correct, we subtract 18 from 38.5 and subtract 38.5 from 59 and compare the two numbers:
38.5 - 18 = 20.5
59 - 38.5 = 20.5
As you can see, the halfway number is 20.5 higher than 18 and 20.5 lower than 59. Therefore, our halfway between answer of 38.5 above is correct.
Halfway Between
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Halfway Between 18 and 60
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