When you ask "What number is halfway between 12 and 543?" 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=543.
To find the number halfway between 12 and 543, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 12 and 543 into our formula, we get:
(12 + 543)/2 = 277.5
Thus, the number halfway between 12 and 543 is 277.5.
To check that our answer is correct, we subtract 12 from 277.5 and subtract 277.5 from 543 and compare the two numbers:
277.5 - 12 = 265.5
543 - 277.5 = 265.5
As you can see, the halfway number is 265.5 higher than 12 and 265.5 lower than 543. Therefore, our halfway between answer of 277.5 above is correct.
Halfway Between
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Halfway Between 12 and 544
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