When you ask "What number is halfway between 12 and 531?" 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=531.
To find the number halfway between 12 and 531, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 531 into our formula, we get:
(12 + 531)/2 = 271.5
Thus, the number halfway between 12 and 531 is 271.5.
To check that our answer is correct, we subtract 12 from 271.5 and subtract 271.5 from 531 and compare the two numbers:
271.5 - 12 = 259.5
531 - 271.5 = 259.5
As you can see, the halfway number is 259.5 higher than 12 and 259.5 lower than 531. Therefore, our halfway between answer of 271.5 above is correct.
Halfway Between
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Halfway Between 12 and 532
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