When you ask "What number is halfway between 12 and 231?" 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=231.
To find the number halfway between 12 and 231, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 231 into our formula, we get:
(12 + 231)/2 = 121.5
Thus, the number halfway between 12 and 231 is 121.5.
To check that our answer is correct, we subtract 12 from 121.5 and subtract 121.5 from 231 and compare the two numbers:
121.5 - 12 = 109.5
231 - 121.5 = 109.5
As you can see, the halfway number is 109.5 higher than 12 and 109.5 lower than 231. Therefore, our halfway between answer of 121.5 above is correct.
Halfway Between
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Halfway Between 12 and 232
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