When you ask "What number is halfway between 18 and 235?" 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=235.
To find the number halfway between 18 and 235, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 235 into our formula, we get:
(18 + 235)/2 = 126.5
Thus, the number halfway between 18 and 235 is 126.5.
To check that our answer is correct, we subtract 18 from 126.5 and subtract 126.5 from 235 and compare the two numbers:
126.5 - 18 = 108.5
235 - 126.5 = 108.5
As you can see, the halfway number is 108.5 higher than 18 and 108.5 lower than 235. Therefore, our halfway between answer of 126.5 above is correct.
Halfway Between
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Halfway Between 18 and 236
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