When you ask "What number is halfway between 88 and 189?" 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=189.
To find the number halfway between 88 and 189, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 88 and 189 into our formula, we get:
(88 + 189)/2 = 138.5
Thus, the number halfway between 88 and 189 is 138.5.
To check that our answer is correct, we subtract 88 from 138.5 and subtract 138.5 from 189 and compare the two numbers:
138.5 - 88 = 50.5
189 - 138.5 = 50.5
As you can see, the halfway number is 50.5 higher than 88 and 50.5 lower than 189. Therefore, our halfway between answer of 138.5 above is correct.
Halfway Between
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Halfway Between 88 and 190
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