When you ask "What number is halfway between 20 and 269?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=20 and Y=269.
To find the number halfway between 20 and 269, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 269 into our formula, we get:
(20 + 269)/2 = 144.5
Thus, the number halfway between 20 and 269 is 144.5.
To check that our answer is correct, we subtract 20 from 144.5 and subtract 144.5 from 269 and compare the two numbers:
144.5 - 20 = 124.5
269 - 144.5 = 124.5
As you can see, the halfway number is 124.5 higher than 20 and 124.5 lower than 269. Therefore, our halfway between answer of 144.5 above is correct.
Halfway Between
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Halfway Between 20 and 270
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