When you ask "What number is halfway between 9 and 269?" 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=269.
To find the number halfway between 9 and 269, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 9 and 269 into our formula, we get:
(9 + 269)/2 = 139
Thus, the number halfway between 9 and 269 is 139.
To check that our answer is correct, we subtract 9 from 139 and subtract 139 from 269 and compare the two numbers:
139 - 9 = 130
269 - 139 = 130
As you can see, the halfway number is 130 higher than 9 and 130 lower than 269. Therefore, our halfway between answer of 139 above is correct.
Halfway Between
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Halfway Between 9 and 270
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