When you ask "What number is halfway between 17 and 199?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=17 and Y=199.
To find the number halfway between 17 and 199, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 199 into our formula, we get:
(17 + 199)/2 = 108
Thus, the number halfway between 17 and 199 is 108.
To check that our answer is correct, we subtract 17 from 108 and subtract 108 from 199 and compare the two numbers:
108 - 17 = 91
199 - 108 = 91
As you can see, the halfway number is 91 higher than 17 and 91 lower than 199. Therefore, our halfway between answer of 108 above is correct.
Halfway Between
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Halfway Between 17 and 200
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