
When you ask "What number is halfway between 6 and 51?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=6 and Y=51.

To find the number halfway between 6 and 51, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 6 and 51 into our formula, we get:
(6 + 51)/2 = 28.5
Thus, the number halfway between 6 and 51 is 28.5.
To check that our answer is correct, we subtract 6 from 28.5 and subtract 28.5 from 51 and compare the two numbers:
28.5 - 6 = 22.5
51 - 28.5 = 22.5
As you can see, the halfway number is 22.5 higher than 6 and 22.5 lower than 51. Therefore, our halfway between answer of 28.5 above is correct.
Halfway Between
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Halfway Between 6 and 52
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