When you ask "What number is halfway between 4 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=4 and Y=111.
To find the number halfway between 4 and 111, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 111 into our formula, we get:
(4 + 111)/2 = 57.5
Thus, the number halfway between 4 and 111 is 57.5.
To check that our answer is correct, we subtract 4 from 57.5 and subtract 57.5 from 111 and compare the two numbers:
57.5 - 4 = 53.5
111 - 57.5 = 53.5
As you can see, the halfway number is 53.5 higher than 4 and 53.5 lower than 111. Therefore, our halfway between answer of 57.5 above is correct.
Halfway Between
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Halfway Between 4 and 112
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