When you ask "What number is halfway between 18 and 103?" 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=103.
To find the number halfway between 18 and 103, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 103 into our formula, we get:
(18 + 103)/2 = 60.5
Thus, the number halfway between 18 and 103 is 60.5.
To check that our answer is correct, we subtract 18 from 60.5 and subtract 60.5 from 103 and compare the two numbers:
60.5 - 18 = 42.5
103 - 60.5 = 42.5
As you can see, the halfway number is 42.5 higher than 18 and 42.5 lower than 103. Therefore, our halfway between answer of 60.5 above is correct.
Halfway Between
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Halfway Between 18 and 104
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