When you ask "What number is halfway between 30 and 859?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=30 and Y=859.
To find the number halfway between 30 and 859, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 859 into our formula, we get:
(30 + 859)/2 = 444.5
Thus, the number halfway between 30 and 859 is 444.5.
To check that our answer is correct, we subtract 30 from 444.5 and subtract 444.5 from 859 and compare the two numbers:
444.5 - 30 = 414.5
859 - 444.5 = 414.5
As you can see, the halfway number is 414.5 higher than 30 and 414.5 lower than 859. Therefore, our halfway between answer of 444.5 above is correct.
Halfway Between
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Halfway Between 30 and 860
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