When you ask "What number is halfway between 12 and 189?" 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=189.
To find the number halfway between 12 and 189, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 189 into our formula, we get:
(12 + 189)/2 = 100.5
Thus, the number halfway between 12 and 189 is 100.5.
To check that our answer is correct, we subtract 12 from 100.5 and subtract 100.5 from 189 and compare the two numbers:
100.5 - 12 = 88.5
189 - 100.5 = 88.5
As you can see, the halfway number is 88.5 higher than 12 and 88.5 lower than 189. Therefore, our halfway between answer of 100.5 above is correct.
Halfway Between
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Halfway Between 12 and 190
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