When you ask "What number is halfway between 30 and 985?" 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=985.
To find the number halfway between 30 and 985, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 985 into our formula, we get:
(30 + 985)/2 = 507.5
Thus, the number halfway between 30 and 985 is 507.5.
To check that our answer is correct, we subtract 30 from 507.5 and subtract 507.5 from 985 and compare the two numbers:
507.5 - 30 = 477.5
985 - 507.5 = 477.5
As you can see, the halfway number is 477.5 higher than 30 and 477.5 lower than 985. Therefore, our halfway between answer of 507.5 above is correct.
Halfway Between
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Halfway Between 30 and 986
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