When you ask "What number is halfway between 88 and 389?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=88 and Y=389.
To find the number halfway between 88 and 389, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 389 into our formula, we get:
(88 + 389)/2 = 238.5
Thus, the number halfway between 88 and 389 is 238.5.
To check that our answer is correct, we subtract 88 from 238.5 and subtract 238.5 from 389 and compare the two numbers:
238.5 - 88 = 150.5
389 - 238.5 = 150.5
As you can see, the halfway number is 150.5 higher than 88 and 150.5 lower than 389. Therefore, our halfway between answer of 238.5 above is correct.
Halfway Between
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Halfway Between 88 and 390
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