When you ask "What number is halfway between 10 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=10 and Y=269.
To find the number halfway between 10 and 269, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 269 into our formula, we get:
(10 + 269)/2 = 139.5
Thus, the number halfway between 10 and 269 is 139.5.
To check that our answer is correct, we subtract 10 from 139.5 and subtract 139.5 from 269 and compare the two numbers:
139.5 - 10 = 129.5
269 - 139.5 = 129.5
As you can see, the halfway number is 129.5 higher than 10 and 129.5 lower than 269. Therefore, our halfway between answer of 139.5 above is correct.
Halfway Between
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Halfway Between 10 and 270
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