When you ask "What number is halfway between 17 and 636?" 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=636.
To find the number halfway between 17 and 636, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 636 into our formula, we get:
(17 + 636)/2 = 326.5
Thus, the number halfway between 17 and 636 is 326.5.
To check that our answer is correct, we subtract 17 from 326.5 and subtract 326.5 from 636 and compare the two numbers:
326.5 - 17 = 309.5
636 - 326.5 = 309.5
As you can see, the halfway number is 309.5 higher than 17 and 309.5 lower than 636. Therefore, our halfway between answer of 326.5 above is correct.
Halfway Between
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Halfway Between 17 and 637
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