When you ask "What number is halfway between 23 and 198?" 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=198.
To find the number halfway between 23 and 198, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 198 into our formula, we get:
(23 + 198)/2 = 110.5
Thus, the number halfway between 23 and 198 is 110.5.
To check that our answer is correct, we subtract 23 from 110.5 and subtract 110.5 from 198 and compare the two numbers:
110.5 - 23 = 87.5
198 - 110.5 = 87.5
As you can see, the halfway number is 87.5 higher than 23 and 87.5 lower than 198. Therefore, our halfway between answer of 110.5 above is correct.
Halfway Between
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Halfway Between 23 and 199
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