When you ask "What number is halfway between 17 and 316?" 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=316.
To find the number halfway between 17 and 316, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 316 into our formula, we get:
(17 + 316)/2 = 166.5
Thus, the number halfway between 17 and 316 is 166.5.
To check that our answer is correct, we subtract 17 from 166.5 and subtract 166.5 from 316 and compare the two numbers:
166.5 - 17 = 149.5
316 - 166.5 = 149.5
As you can see, the halfway number is 149.5 higher than 17 and 149.5 lower than 316. Therefore, our halfway between answer of 166.5 above is correct.
Halfway Between
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Halfway Between 17 and 317
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