When you ask "What number is halfway between 30 and 847?" 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=847.
To find the number halfway between 30 and 847, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 30 and 847 into our formula, we get:
(30 + 847)/2 = 438.5
Thus, the number halfway between 30 and 847 is 438.5.
To check that our answer is correct, we subtract 30 from 438.5 and subtract 438.5 from 847 and compare the two numbers:
438.5 - 30 = 408.5
847 - 438.5 = 408.5
As you can see, the halfway number is 408.5 higher than 30 and 408.5 lower than 847. Therefore, our halfway between answer of 438.5 above is correct.
Halfway Between
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Halfway Between 30 and 848
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