When you ask "What number is halfway between 10 and 889?" 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=889.
To find the number halfway between 10 and 889, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 889 into our formula, we get:
(10 + 889)/2 = 449.5
Thus, the number halfway between 10 and 889 is 449.5.
To check that our answer is correct, we subtract 10 from 449.5 and subtract 449.5 from 889 and compare the two numbers:
449.5 - 10 = 439.5
889 - 449.5 = 439.5
As you can see, the halfway number is 439.5 higher than 10 and 439.5 lower than 889. Therefore, our halfway between answer of 449.5 above is correct.
Halfway Between
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Halfway Between 10 and 890
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