When you ask "What number is halfway between 2 and 221?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=2 and Y=221.
To find the number halfway between 2 and 221, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 2 and 221 into our formula, we get:
(2 + 221)/2 = 111.5
Thus, the number halfway between 2 and 221 is 111.5.
To check that our answer is correct, we subtract 2 from 111.5 and subtract 111.5 from 221 and compare the two numbers:
111.5 - 2 = 109.5
221 - 111.5 = 109.5
As you can see, the halfway number is 109.5 higher than 2 and 109.5 lower than 221. Therefore, our halfway between answer of 111.5 above is correct.
Halfway Between
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Halfway Between 2 and 222
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