When you ask "What number is halfway between 8 and 13?" 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=13.
To find the number halfway between 8 and 13, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 13 into our formula, we get:
(8 + 13)/2 = 10.5
Thus, the number halfway between 8 and 13 is 10.5.
To check that our answer is correct, we subtract 8 from 10.5 and subtract 10.5 from 13 and compare the two numbers:
10.5 - 8 = 2.5
13 - 10.5 = 2.5
As you can see, the halfway number is 2.5 higher than 8 and 2.5 lower than 13. Therefore, our halfway between answer of 10.5 above is correct.
Halfway Between
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Halfway Between 8 and 14
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