When you ask "What number is halfway between 85 and 270?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=85 and Y=270.
To find the number halfway between 85 and 270, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 270 into our formula, we get:
(85 + 270)/2 = 177.5
Thus, the number halfway between 85 and 270 is 177.5.
To check that our answer is correct, we subtract 85 from 177.5 and subtract 177.5 from 270 and compare the two numbers:
177.5 - 85 = 92.5
270 - 177.5 = 92.5
As you can see, the halfway number is 92.5 higher than 85 and 92.5 lower than 270. Therefore, our halfway between answer of 177.5 above is correct.
Halfway Between
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Halfway Between 85 and 271
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