When you ask "What number is halfway between 17 and 288?" 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=288.
To find the number halfway between 17 and 288, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 17 and 288 into our formula, we get:
(17 + 288)/2 = 152.5
Thus, the number halfway between 17 and 288 is 152.5.
To check that our answer is correct, we subtract 17 from 152.5 and subtract 152.5 from 288 and compare the two numbers:
152.5 - 17 = 135.5
288 - 152.5 = 135.5
As you can see, the halfway number is 135.5 higher than 17 and 135.5 lower than 288. Therefore, our halfway between answer of 152.5 above is correct.
Halfway Between
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Halfway Between 17 and 289
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