When you ask "What number is halfway between 8 and 289?" 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=289.
To find the number halfway between 8 and 289, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 289 into our formula, we get:
(8 + 289)/2 = 148.5
Thus, the number halfway between 8 and 289 is 148.5.
To check that our answer is correct, we subtract 8 from 148.5 and subtract 148.5 from 289 and compare the two numbers:
148.5 - 8 = 140.5
289 - 148.5 = 140.5
As you can see, the halfway number is 140.5 higher than 8 and 140.5 lower than 289. Therefore, our halfway between answer of 148.5 above is correct.
Halfway Between
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Halfway Between 8 and 290
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