When you ask "What number is halfway between 17 and 424?" 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=424.
To find the number halfway between 17 and 424, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 424 into our formula, we get:
(17 + 424)/2 = 220.5
Thus, the number halfway between 17 and 424 is 220.5.
To check that our answer is correct, we subtract 17 from 220.5 and subtract 220.5 from 424 and compare the two numbers:
220.5 - 17 = 203.5
424 - 220.5 = 203.5
As you can see, the halfway number is 203.5 higher than 17 and 203.5 lower than 424. Therefore, our halfway between answer of 220.5 above is correct.
Halfway Between
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Halfway Between 17 and 425
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