When you ask "What number is halfway between 18 and 187?" 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=187.
To find the number halfway between 18 and 187, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 187 into our formula, we get:
(18 + 187)/2 = 102.5
Thus, the number halfway between 18 and 187 is 102.5.
To check that our answer is correct, we subtract 18 from 102.5 and subtract 102.5 from 187 and compare the two numbers:
102.5 - 18 = 84.5
187 - 102.5 = 84.5
As you can see, the halfway number is 84.5 higher than 18 and 84.5 lower than 187. Therefore, our halfway between answer of 102.5 above is correct.
Halfway Between
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Halfway Between 18 and 188
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