When you ask "What number is halfway between 50 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=50 and Y=209.
To find the number halfway between 50 and 209, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 50 and 209 into our formula, we get:
(50 + 209)/2 = 129.5
Thus, the number halfway between 50 and 209 is 129.5.
To check that our answer is correct, we subtract 50 from 129.5 and subtract 129.5 from 209 and compare the two numbers:
129.5 - 50 = 79.5
209 - 129.5 = 79.5
As you can see, the halfway number is 79.5 higher than 50 and 79.5 lower than 209. Therefore, our halfway between answer of 129.5 above is correct.
Halfway Between
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Halfway Between 50 and 210
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