When you ask "What number is halfway between 12 and 285?" 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=285.
To find the number halfway between 12 and 285, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 285 into our formula, we get:
(12 + 285)/2 = 148.5
Thus, the number halfway between 12 and 285 is 148.5.
To check that our answer is correct, we subtract 12 from 148.5 and subtract 148.5 from 285 and compare the two numbers:
148.5 - 12 = 136.5
285 - 148.5 = 136.5
As you can see, the halfway number is 136.5 higher than 12 and 136.5 lower than 285. Therefore, our halfway between answer of 148.5 above is correct.
Halfway Between
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Halfway Between 12 and 286
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