When you ask "What number is halfway between 23 and 100?" 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=100.
To find the number halfway between 23 and 100, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 100 into our formula, we get:
(23 + 100)/2 = 61.5
Thus, the number halfway between 23 and 100 is 61.5.
To check that our answer is correct, we subtract 23 from 61.5 and subtract 61.5 from 100 and compare the two numbers:
61.5 - 23 = 38.5
100 - 61.5 = 38.5
As you can see, the halfway number is 38.5 higher than 23 and 38.5 lower than 100. Therefore, our halfway between answer of 61.5 above is correct.
Halfway Between
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Halfway Between 23 and 101
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