When you ask "What number is halfway between 8 and 309?" 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=309.
To find the number halfway between 8 and 309, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 309 into our formula, we get:
(8 + 309)/2 = 158.5
Thus, the number halfway between 8 and 309 is 158.5.
To check that our answer is correct, we subtract 8 from 158.5 and subtract 158.5 from 309 and compare the two numbers:
158.5 - 8 = 150.5
309 - 158.5 = 150.5
As you can see, the halfway number is 150.5 higher than 8 and 150.5 lower than 309. Therefore, our halfway between answer of 158.5 above is correct.
Halfway Between
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Halfway Between 8 and 310
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