When you ask "What number is halfway between 51 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=51 and Y=173.
To find the number halfway between 51 and 173, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 51 and 173 into our formula, we get:
(51 + 173)/2 = 112
Thus, the number halfway between 51 and 173 is 112.
To check that our answer is correct, we subtract 51 from 112 and subtract 112 from 173 and compare the two numbers:
112 - 51 = 61
173 - 112 = 61
As you can see, the halfway number is 61 higher than 51 and 61 lower than 173. Therefore, our halfway between answer of 112 above is correct.
Halfway Between
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Halfway Between 51 and 174
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