When you ask "What number is halfway between 88 and 555?" 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=555.
To find the number halfway between 88 and 555, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 555 into our formula, we get:
(88 + 555)/2 = 321.5
Thus, the number halfway between 88 and 555 is 321.5.
To check that our answer is correct, we subtract 88 from 321.5 and subtract 321.5 from 555 and compare the two numbers:
321.5 - 88 = 233.5
555 - 321.5 = 233.5
As you can see, the halfway number is 233.5 higher than 88 and 233.5 lower than 555. Therefore, our halfway between answer of 321.5 above is correct.
Halfway Between
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Halfway Between 88 and 556
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