When you ask "What number is halfway between 17 and 209?" 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=209.
To find the number halfway between 17 and 209, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 209 into our formula, we get:
(17 + 209)/2 = 113
Thus, the number halfway between 17 and 209 is 113.
To check that our answer is correct, we subtract 17 from 113 and subtract 113 from 209 and compare the two numbers:
113 - 17 = 96
209 - 113 = 96
As you can see, the halfway number is 96 higher than 17 and 96 lower than 209. Therefore, our halfway between answer of 113 above is correct.
Halfway Between
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Halfway Between 17 and 210
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