When you ask "What number is halfway between 17 and 454?" 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=454.
To find the number halfway between 17 and 454, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 454 into our formula, we get:
(17 + 454)/2 = 235.5
Thus, the number halfway between 17 and 454 is 235.5.
To check that our answer is correct, we subtract 17 from 235.5 and subtract 235.5 from 454 and compare the two numbers:
235.5 - 17 = 218.5
454 - 235.5 = 218.5
As you can see, the halfway number is 218.5 higher than 17 and 218.5 lower than 454. Therefore, our halfway between answer of 235.5 above is correct.
Halfway Between
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Halfway Between 17 and 455
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