When you ask "What number is halfway between 3 and 111?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=3 and Y=111.
To find the number halfway between 3 and 111, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 111 into our formula, we get:
(3 + 111)/2 = 57
Thus, the number halfway between 3 and 111 is 57.
To check that our answer is correct, we subtract 3 from 57 and subtract 57 from 111 and compare the two numbers:
57 - 3 = 54
111 - 57 = 54
As you can see, the halfway number is 54 higher than 3 and 54 lower than 111. Therefore, our halfway between answer of 57 above is correct.
Halfway Between
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Halfway Between 3 and 112
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