When you ask "What number is halfway between 17 and 634?" 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=634.
To find the number halfway between 17 and 634, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 634 into our formula, we get:
(17 + 634)/2 = 325.5
Thus, the number halfway between 17 and 634 is 325.5.
To check that our answer is correct, we subtract 17 from 325.5 and subtract 325.5 from 634 and compare the two numbers:
325.5 - 17 = 308.5
634 - 325.5 = 308.5
As you can see, the halfway number is 308.5 higher than 17 and 308.5 lower than 634. Therefore, our halfway between answer of 325.5 above is correct.
Halfway Between
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Halfway Between 17 and 635
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