When you ask "What number is halfway between 23 and 178?" 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=178.
To find the number halfway between 23 and 178, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 178 into our formula, we get:
(23 + 178)/2 = 100.5
Thus, the number halfway between 23 and 178 is 100.5.
To check that our answer is correct, we subtract 23 from 100.5 and subtract 100.5 from 178 and compare the two numbers:
100.5 - 23 = 77.5
178 - 100.5 = 77.5
As you can see, the halfway number is 77.5 higher than 23 and 77.5 lower than 178. Therefore, our halfway between answer of 100.5 above is correct.
Halfway Between
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Halfway Between 23 and 179
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