When you ask "What number is halfway between 30 and 609?" 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=609.
To find the number halfway between 30 and 609, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 609 into our formula, we get:
(30 + 609)/2 = 319.5
Thus, the number halfway between 30 and 609 is 319.5.
To check that our answer is correct, we subtract 30 from 319.5 and subtract 319.5 from 609 and compare the two numbers:
319.5 - 30 = 289.5
609 - 319.5 = 289.5
As you can see, the halfway number is 289.5 higher than 30 and 289.5 lower than 609. Therefore, our halfway between answer of 319.5 above is correct.
Halfway Between
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Halfway Between 30 and 610
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