When you ask "What number is halfway between 12 and 137?" 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=137.
To find the number halfway between 12 and 137, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 137 into our formula, we get:
(12 + 137)/2 = 74.5
Thus, the number halfway between 12 and 137 is 74.5.
To check that our answer is correct, we subtract 12 from 74.5 and subtract 74.5 from 137 and compare the two numbers:
74.5 - 12 = 62.5
137 - 74.5 = 62.5
As you can see, the halfway number is 62.5 higher than 12 and 62.5 lower than 137. Therefore, our halfway between answer of 74.5 above is correct.
Halfway Between
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Halfway Between 12 and 138
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