When you ask "What number is halfway between 4 and 219?" 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=219.
To find the number halfway between 4 and 219, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 219 into our formula, we get:
(4 + 219)/2 = 111.5
Thus, the number halfway between 4 and 219 is 111.5.
To check that our answer is correct, we subtract 4 from 111.5 and subtract 111.5 from 219 and compare the two numbers:
111.5 - 4 = 107.5
219 - 111.5 = 107.5
As you can see, the halfway number is 107.5 higher than 4 and 107.5 lower than 219. Therefore, our halfway between answer of 111.5 above is correct.
Halfway Between
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Halfway Between 4 and 220
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