When you ask "What number is halfway between 85 and 272?" 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=272.
To find the number halfway between 85 and 272, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 272 into our formula, we get:
(85 + 272)/2 = 178.5
Thus, the number halfway between 85 and 272 is 178.5.
To check that our answer is correct, we subtract 85 from 178.5 and subtract 178.5 from 272 and compare the two numbers:
178.5 - 85 = 93.5
272 - 178.5 = 93.5
As you can see, the halfway number is 93.5 higher than 85 and 93.5 lower than 272. Therefore, our halfway between answer of 178.5 above is correct.
Halfway Between
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Halfway Between 85 and 273
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