When you ask "What number is halfway between 88 and 289?" 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=289.
To find the number halfway between 88 and 289, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 289 into our formula, we get:
(88 + 289)/2 = 188.5
Thus, the number halfway between 88 and 289 is 188.5.
To check that our answer is correct, we subtract 88 from 188.5 and subtract 188.5 from 289 and compare the two numbers:
188.5 - 88 = 100.5
289 - 188.5 = 100.5
As you can see, the halfway number is 100.5 higher than 88 and 100.5 lower than 289. Therefore, our halfway between answer of 188.5 above is correct.
Halfway Between
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Halfway Between 88 and 290
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