When you ask "What number is halfway between 12 and 225?" 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=225.
To find the number halfway between 12 and 225, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 225 into our formula, we get:
(12 + 225)/2 = 118.5
Thus, the number halfway between 12 and 225 is 118.5.
To check that our answer is correct, we subtract 12 from 118.5 and subtract 118.5 from 225 and compare the two numbers:
118.5 - 12 = 106.5
225 - 118.5 = 106.5
As you can see, the halfway number is 106.5 higher than 12 and 106.5 lower than 225. Therefore, our halfway between answer of 118.5 above is correct.
Halfway Between
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Halfway Between 12 and 226
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