When you ask "What number is halfway between 18 and 47?" 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=47.
To find the number halfway between 18 and 47, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 47 into our formula, we get:
(18 + 47)/2 = 32.5
Thus, the number halfway between 18 and 47 is 32.5.
To check that our answer is correct, we subtract 18 from 32.5 and subtract 32.5 from 47 and compare the two numbers:
32.5 - 18 = 14.5
47 - 32.5 = 14.5
As you can see, the halfway number is 14.5 higher than 18 and 14.5 lower than 47. Therefore, our halfway between answer of 32.5 above is correct.
Halfway Between
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Halfway Between 18 and 48
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