When you ask "What number is halfway between 9 and 115?" 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=115.
To find the number halfway between 9 and 115, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 115 into our formula, we get:
(9 + 115)/2 = 62
Thus, the number halfway between 9 and 115 is 62.
To check that our answer is correct, we subtract 9 from 62 and subtract 62 from 115 and compare the two numbers:
62 - 9 = 53
115 - 62 = 53
As you can see, the halfway number is 53 higher than 9 and 53 lower than 115. Therefore, our halfway between answer of 62 above is correct.
Halfway Between
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Halfway Between 9 and 116
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