When you ask "What number is halfway between 10 and 439?" 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=439.
To find the number halfway between 10 and 439, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 439 into our formula, we get:
(10 + 439)/2 = 224.5
Thus, the number halfway between 10 and 439 is 224.5.
To check that our answer is correct, we subtract 10 from 224.5 and subtract 224.5 from 439 and compare the two numbers:
224.5 - 10 = 214.5
439 - 224.5 = 214.5
As you can see, the halfway number is 214.5 higher than 10 and 214.5 lower than 439. Therefore, our halfway between answer of 224.5 above is correct.
Halfway Between
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Halfway Between 10 and 440
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