When you ask "What number is halfway between 8 and 387?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=8 and Y=387.
To find the number halfway between 8 and 387, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 387 into our formula, we get:
(8 + 387)/2 = 197.5
Thus, the number halfway between 8 and 387 is 197.5.
To check that our answer is correct, we subtract 8 from 197.5 and subtract 197.5 from 387 and compare the two numbers:
197.5 - 8 = 189.5
387 - 197.5 = 189.5
As you can see, the halfway number is 189.5 higher than 8 and 189.5 lower than 387. Therefore, our halfway between answer of 197.5 above is correct.
Halfway Between
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Halfway Between 8 and 388
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