When you ask "What number is halfway between 30 and 613?" 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=613.
To find the number halfway between 30 and 613, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 613 into our formula, we get:
(30 + 613)/2 = 321.5
Thus, the number halfway between 30 and 613 is 321.5.
To check that our answer is correct, we subtract 30 from 321.5 and subtract 321.5 from 613 and compare the two numbers:
321.5 - 30 = 291.5
613 - 321.5 = 291.5
As you can see, the halfway number is 291.5 higher than 30 and 291.5 lower than 613. Therefore, our halfway between answer of 321.5 above is correct.
Halfway Between
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