When you ask "What number is halfway between 12 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=12 and Y=219.
To find the number halfway between 12 and 219, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 219 into our formula, we get:
(12 + 219)/2 = 115.5
Thus, the number halfway between 12 and 219 is 115.5.
To check that our answer is correct, we subtract 12 from 115.5 and subtract 115.5 from 219 and compare the two numbers:
115.5 - 12 = 103.5
219 - 115.5 = 103.5
As you can see, the halfway number is 103.5 higher than 12 and 103.5 lower than 219. Therefore, our halfway between answer of 115.5 above is correct.
Halfway Between
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Halfway Between 12 and 220
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