When you ask "What number is halfway between 20 and 249?" 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=249.
To find the number halfway between 20 and 249, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 20 and 249 into our formula, we get:
(20 + 249)/2 = 134.5
Thus, the number halfway between 20 and 249 is 134.5.
To check that our answer is correct, we subtract 20 from 134.5 and subtract 134.5 from 249 and compare the two numbers:
134.5 - 20 = 114.5
249 - 134.5 = 114.5
As you can see, the halfway number is 114.5 higher than 20 and 114.5 lower than 249. Therefore, our halfway between answer of 134.5 above is correct.
Halfway Between
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Halfway Between 20 and 250
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