When you ask "What number is halfway between 23 and 120?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=23 and Y=120.
To find the number halfway between 23 and 120, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 120 into our formula, we get:
(23 + 120)/2 = 71.5
Thus, the number halfway between 23 and 120 is 71.5.
To check that our answer is correct, we subtract 23 from 71.5 and subtract 71.5 from 120 and compare the two numbers:
71.5 - 23 = 48.5
120 - 71.5 = 48.5
As you can see, the halfway number is 48.5 higher than 23 and 48.5 lower than 120. Therefore, our halfway between answer of 71.5 above is correct.
Halfway Between
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Halfway Between 23 and 121
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