When you ask "What number is halfway between 10 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=10 and Y=249.
To find the number halfway between 10 and 249, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 249 into our formula, we get:
(10 + 249)/2 = 129.5
Thus, the number halfway between 10 and 249 is 129.5.
To check that our answer is correct, we subtract 10 from 129.5 and subtract 129.5 from 249 and compare the two numbers:
129.5 - 10 = 119.5
249 - 129.5 = 119.5
As you can see, the halfway number is 119.5 higher than 10 and 119.5 lower than 249. Therefore, our halfway between answer of 129.5 above is correct.
Halfway Between
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Halfway Between 10 and 250
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