When you ask "What number is halfway between 2 and 123?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=2 and Y=123.
To find the number halfway between 2 and 123, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 2 and 123 into our formula, we get:
(2 + 123)/2 = 62.5
Thus, the number halfway between 2 and 123 is 62.5.
To check that our answer is correct, we subtract 2 from 62.5 and subtract 62.5 from 123 and compare the two numbers:
62.5 - 2 = 60.5
123 - 62.5 = 60.5
As you can see, the halfway number is 60.5 higher than 2 and 60.5 lower than 123. Therefore, our halfway between answer of 62.5 above is correct.
Halfway Between
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Halfway Between 2 and 124
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