When you ask "What number is halfway between 27 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=27 and Y=209.
To find the number halfway between 27 and 209, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 27 and 209 into our formula, we get:
(27 + 209)/2 = 118
Thus, the number halfway between 27 and 209 is 118.
To check that our answer is correct, we subtract 27 from 118 and subtract 118 from 209 and compare the two numbers:
118 - 27 = 91
209 - 118 = 91
As you can see, the halfway number is 91 higher than 27 and 91 lower than 209. Therefore, our halfway between answer of 118 above is correct.
Halfway Between
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Halfway Between 27 and 210
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