When you ask "What number is halfway between 85 and 330?" 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=330.
To find the number halfway between 85 and 330, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 330 into our formula, we get:
(85 + 330)/2 = 207.5
Thus, the number halfway between 85 and 330 is 207.5.
To check that our answer is correct, we subtract 85 from 207.5 and subtract 207.5 from 330 and compare the two numbers:
207.5 - 85 = 122.5
330 - 207.5 = 122.5
As you can see, the halfway number is 122.5 higher than 85 and 122.5 lower than 330. Therefore, our halfway between answer of 207.5 above is correct.
Halfway Between
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Halfway Between 85 and 331
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