When you ask "What number is halfway between 12 and 845?" 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=845.
To find the number halfway between 12 and 845, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 845 into our formula, we get:
(12 + 845)/2 = 428.5
Thus, the number halfway between 12 and 845 is 428.5.
To check that our answer is correct, we subtract 12 from 428.5 and subtract 428.5 from 845 and compare the two numbers:
428.5 - 12 = 416.5
845 - 428.5 = 416.5
As you can see, the halfway number is 416.5 higher than 12 and 416.5 lower than 845. Therefore, our halfway between answer of 428.5 above is correct.
Halfway Between
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Halfway Between 12 and 846
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