When you ask "What number is halfway between 18 and 163?" 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=163.
To find the number halfway between 18 and 163, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 163 into our formula, we get:
(18 + 163)/2 = 90.5
Thus, the number halfway between 18 and 163 is 90.5.
To check that our answer is correct, we subtract 18 from 90.5 and subtract 90.5 from 163 and compare the two numbers:
90.5 - 18 = 72.5
163 - 90.5 = 72.5
As you can see, the halfway number is 72.5 higher than 18 and 72.5 lower than 163. Therefore, our halfway between answer of 90.5 above is correct.
Halfway Between
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Halfway Between 18 and 164
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