When you ask "What number is halfway between 0 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=0 and Y=123.
To find the number halfway between 0 and 123, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 0 and 123 into our formula, we get:
(0 + 123)/2 = 61.5
Thus, the number halfway between 0 and 123 is 61.5.
To check that our answer is correct, we subtract 0 from 61.5 and subtract 61.5 from 123 and compare the two numbers:
61.5 - 0 = 61.5
123 - 61.5 = 61.5
As you can see, the halfway number is 61.5 higher than 0 and 61.5 lower than 123. Therefore, our halfway between answer of 61.5 above is correct.
Halfway Between
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Halfway Between 0 and 124
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