When you ask "What number is halfway between 47 and 511?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=47 and Y=511.
To find the number halfway between 47 and 511, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 47 and 511 into our formula, we get:
(47 + 511)/2 = 279
Thus, the number halfway between 47 and 511 is 279.
To check that our answer is correct, we subtract 47 from 279 and subtract 279 from 511 and compare the two numbers:
279 - 47 = 232
511 - 279 = 232
As you can see, the halfway number is 232 higher than 47 and 232 lower than 511. Therefore, our halfway between answer of 279 above is correct.
Halfway Between
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Halfway Between 47 and 512
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