When you ask "What number is halfway between 18 and 185?" 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=185.
To find the number halfway between 18 and 185, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 185 into our formula, we get:
(18 + 185)/2 = 101.5
Thus, the number halfway between 18 and 185 is 101.5.
To check that our answer is correct, we subtract 18 from 101.5 and subtract 101.5 from 185 and compare the two numbers:
101.5 - 18 = 83.5
185 - 101.5 = 83.5
As you can see, the halfway number is 83.5 higher than 18 and 83.5 lower than 185. Therefore, our halfway between answer of 101.5 above is correct.
Halfway Between
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Halfway Between 18 and 186
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