When you ask "What number is halfway between 18 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=18 and Y=269.
To find the number halfway between 18 and 269, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 269 into our formula, we get:
(18 + 269)/2 = 143.5
Thus, the number halfway between 18 and 269 is 143.5.
To check that our answer is correct, we subtract 18 from 143.5 and subtract 143.5 from 269 and compare the two numbers:
143.5 - 18 = 125.5
269 - 143.5 = 125.5
As you can see, the halfway number is 125.5 higher than 18 and 125.5 lower than 269. Therefore, our halfway between answer of 143.5 above is correct.
Halfway Between
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Halfway Between 18 and 270
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