When you ask "What number is halfway between 8 and 869?" 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=869.
To find the number halfway between 8 and 869, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 869 into our formula, we get:
(8 + 869)/2 = 438.5
Thus, the number halfway between 8 and 869 is 438.5.
To check that our answer is correct, we subtract 8 from 438.5 and subtract 438.5 from 869 and compare the two numbers:
438.5 - 8 = 430.5
869 - 438.5 = 430.5
As you can see, the halfway number is 430.5 higher than 8 and 430.5 lower than 869. Therefore, our halfway between answer of 438.5 above is correct.
Halfway Between
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Halfway Between 8 and 870
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