When you ask "What number is halfway between 9 and 284?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=9 and Y=284.
To find the number halfway between 9 and 284, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 284 into our formula, we get:
(9 + 284)/2 = 146.5
Thus, the number halfway between 9 and 284 is 146.5.
To check that our answer is correct, we subtract 9 from 146.5 and subtract 146.5 from 284 and compare the two numbers:
146.5 - 9 = 137.5
284 - 146.5 = 137.5
As you can see, the halfway number is 137.5 higher than 9 and 137.5 lower than 284. Therefore, our halfway between answer of 146.5 above is correct.
Halfway Between
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Halfway Between 9 and 285
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