When you ask "What number is halfway between 17 and 456?" 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=456.
To find the number halfway between 17 and 456, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 456 into our formula, we get:
(17 + 456)/2 = 236.5
Thus, the number halfway between 17 and 456 is 236.5.
To check that our answer is correct, we subtract 17 from 236.5 and subtract 236.5 from 456 and compare the two numbers:
236.5 - 17 = 219.5
456 - 236.5 = 219.5
As you can see, the halfway number is 219.5 higher than 17 and 219.5 lower than 456. Therefore, our halfway between answer of 236.5 above is correct.
Halfway Between
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Halfway Between 17 and 457
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