When you ask "What number is halfway between 18 and 247?" 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=247.
To find the number halfway between 18 and 247, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 247 into our formula, we get:
(18 + 247)/2 = 132.5
Thus, the number halfway between 18 and 247 is 132.5.
To check that our answer is correct, we subtract 18 from 132.5 and subtract 132.5 from 247 and compare the two numbers:
132.5 - 18 = 114.5
247 - 132.5 = 114.5
As you can see, the halfway number is 114.5 higher than 18 and 114.5 lower than 247. Therefore, our halfway between answer of 132.5 above is correct.
Halfway Between
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Halfway Between 18 and 248
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