When you ask "What number is halfway between 23 and 154?" 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=154.
To find the number halfway between 23 and 154, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 154 into our formula, we get:
(23 + 154)/2 = 88.5
Thus, the number halfway between 23 and 154 is 88.5.
To check that our answer is correct, we subtract 23 from 88.5 and subtract 88.5 from 154 and compare the two numbers:
88.5 - 23 = 65.5
154 - 88.5 = 65.5
As you can see, the halfway number is 65.5 higher than 23 and 65.5 lower than 154. Therefore, our halfway between answer of 88.5 above is correct.
Halfway Between
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Halfway Between 23 and 155
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