When you ask "What number is halfway between 17 and 564?" 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=564.
To find the number halfway between 17 and 564, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 564 into our formula, we get:
(17 + 564)/2 = 290.5
Thus, the number halfway between 17 and 564 is 290.5.
To check that our answer is correct, we subtract 17 from 290.5 and subtract 290.5 from 564 and compare the two numbers:
290.5 - 17 = 273.5
564 - 290.5 = 273.5
As you can see, the halfway number is 273.5 higher than 17 and 273.5 lower than 564. Therefore, our halfway between answer of 290.5 above is correct.
Halfway Between
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Halfway Between 17 and 565
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