When you ask "What number is halfway between 9 and 240?" 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=240.
To find the number halfway between 9 and 240, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 240 into our formula, we get:
(9 + 240)/2 = 124.5
Thus, the number halfway between 9 and 240 is 124.5.
To check that our answer is correct, we subtract 9 from 124.5 and subtract 124.5 from 240 and compare the two numbers:
124.5 - 9 = 115.5
240 - 124.5 = 115.5
As you can see, the halfway number is 115.5 higher than 9 and 115.5 lower than 240. Therefore, our halfway between answer of 124.5 above is correct.
Halfway Between
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Halfway Between 9 and 241
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