When you ask "What number is halfway between 23 and 220?" 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=220.
To find the number halfway between 23 and 220, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 220 into our formula, we get:
(23 + 220)/2 = 121.5
Thus, the number halfway between 23 and 220 is 121.5.
To check that our answer is correct, we subtract 23 from 121.5 and subtract 121.5 from 220 and compare the two numbers:
121.5 - 23 = 98.5
220 - 121.5 = 98.5
As you can see, the halfway number is 98.5 higher than 23 and 98.5 lower than 220. Therefore, our halfway between answer of 121.5 above is correct.
Halfway Between
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Halfway Between 23 and 221
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