When you ask "What number is halfway between 17 and 630?" 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=630.
To find the number halfway between 17 and 630, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 630 into our formula, we get:
(17 + 630)/2 = 323.5
Thus, the number halfway between 17 and 630 is 323.5.
To check that our answer is correct, we subtract 17 from 323.5 and subtract 323.5 from 630 and compare the two numbers:
323.5 - 17 = 306.5
630 - 323.5 = 306.5
As you can see, the halfway number is 306.5 higher than 17 and 306.5 lower than 630. Therefore, our halfway between answer of 323.5 above is correct.
Halfway Between
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Halfway Between 17 and 631
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