When you ask "What number is halfway between 54 and 173?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=54 and Y=173.
To find the number halfway between 54 and 173, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 54 and 173 into our formula, we get:
(54 + 173)/2 = 113.5
Thus, the number halfway between 54 and 173 is 113.5.
To check that our answer is correct, we subtract 54 from 113.5 and subtract 113.5 from 173 and compare the two numbers:
113.5 - 54 = 59.5
173 - 113.5 = 59.5
As you can see, the halfway number is 59.5 higher than 54 and 59.5 lower than 173. Therefore, our halfway between answer of 113.5 above is correct.
Halfway Between
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Halfway Between 54 and 174
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