When you ask "What number is halfway between 1 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=1 and Y=221.
To find the number halfway between 1 and 221, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 1 and 221 into our formula, we get:
(1 + 221)/2 = 111
Thus, the number halfway between 1 and 221 is 111.
To check that our answer is correct, we subtract 1 from 111 and subtract 111 from 221 and compare the two numbers:
111 - 1 = 110
221 - 111 = 110
As you can see, the halfway number is 110 higher than 1 and 110 lower than 221. Therefore, our halfway between answer of 111 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 1 and 222
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