When you ask "What number is halfway between 3 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=3 and Y=209.
To find the number halfway between 3 and 209, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 209 into our formula, we get:
(3 + 209)/2 = 106
Thus, the number halfway between 3 and 209 is 106.
To check that our answer is correct, we subtract 3 from 106 and subtract 106 from 209 and compare the two numbers:
106 - 3 = 103
209 - 106 = 103
As you can see, the halfway number is 103 higher than 3 and 103 lower than 209. Therefore, our halfway between answer of 106 above is correct.
Halfway Between
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Halfway Between 3 and 210
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