When you ask "What number is halfway between 17 and 270?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=17 and Y=270.
To find the number halfway between 17 and 270, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 270 into our formula, we get:
(17 + 270)/2 = 143.5
Thus, the number halfway between 17 and 270 is 143.5.
To check that our answer is correct, we subtract 17 from 143.5 and subtract 143.5 from 270 and compare the two numbers:
143.5 - 17 = 126.5
270 - 143.5 = 126.5
As you can see, the halfway number is 126.5 higher than 17 and 126.5 lower than 270. Therefore, our halfway between answer of 143.5 above is correct.
Halfway Between
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Halfway Between 17 and 271
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