When you ask "What number is halfway between 1 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=1 and Y=111.
To find the number halfway between 1 and 111, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 1 and 111 into our formula, we get:
(1 + 111)/2 = 56
Thus, the number halfway between 1 and 111 is 56.
To check that our answer is correct, we subtract 1 from 56 and subtract 56 from 111 and compare the two numbers:
56 - 1 = 55
111 - 56 = 55
As you can see, the halfway number is 55 higher than 1 and 55 lower than 111. Therefore, our halfway between answer of 56 above is correct.
Halfway Between
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Halfway Between 1 and 112
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