When you ask "What number is halfway between 4 and 389?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=4 and Y=389.
To find the number halfway between 4 and 389, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 4 and 389 into our formula, we get:
(4 + 389)/2 = 196.5
Thus, the number halfway between 4 and 389 is 196.5.
To check that our answer is correct, we subtract 4 from 196.5 and subtract 196.5 from 389 and compare the two numbers:
196.5 - 4 = 192.5
389 - 196.5 = 192.5
As you can see, the halfway number is 192.5 higher than 4 and 192.5 lower than 389. Therefore, our halfway between answer of 196.5 above is correct.
Halfway Between
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Halfway Between 4 and 390
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