When you ask "What number is halfway between 34 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=34 and Y=123.
To find the number halfway between 34 and 123, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 34 and 123 into our formula, we get:
(34 + 123)/2 = 78.5
Thus, the number halfway between 34 and 123 is 78.5.
To check that our answer is correct, we subtract 34 from 78.5 and subtract 78.5 from 123 and compare the two numbers:
78.5 - 34 = 44.5
123 - 78.5 = 44.5
As you can see, the halfway number is 44.5 higher than 34 and 44.5 lower than 123. Therefore, our halfway between answer of 78.5 above is correct.
Halfway Between
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Halfway Between 34 and 124
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