
When you ask "What number is halfway between 48 and 54?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=48 and Y=54.

To find the number halfway between 48 and 54, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 48 and 54 into our formula, we get:
(48 + 54)/2 = 51
Thus, the number halfway between 48 and 54 is 51.
To check that our answer is correct, we subtract 48 from 51 and subtract 51 from 54 and compare the two numbers:
51 - 48 = 3
54 - 51 = 3
As you can see, the halfway number is 3 higher than 48 and 3 lower than 54. Therefore, our halfway between answer of 51 above is correct.
Halfway Between
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Halfway Between 48 and 55
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