When you ask "What number is halfway between 18 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=18 and Y=288.
To find the number halfway between 18 and 288, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 18 and 288 into our formula, we get:
(18 + 288)/2 = 153
Thus, the number halfway between 18 and 288 is 153.
To check that our answer is correct, we subtract 18 from 153 and subtract 153 from 288 and compare the two numbers:
153 - 18 = 135
288 - 153 = 135
As you can see, the halfway number is 135 higher than 18 and 135 lower than 288. Therefore, our halfway between answer of 153 above is correct.
Halfway Between
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Halfway Between 18 and 289
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