When you ask "What number is halfway between 85 and 207?" 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=207.
To find the number halfway between 85 and 207, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 85 and 207 into our formula, we get:
(85 + 207)/2 = 146
Thus, the number halfway between 85 and 207 is 146.
To check that our answer is correct, we subtract 85 from 146 and subtract 146 from 207 and compare the two numbers:
146 - 85 = 61
207 - 146 = 61
As you can see, the halfway number is 61 higher than 85 and 61 lower than 207. Therefore, our halfway between answer of 146 above is correct.
Halfway Between
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Halfway Between 85 and 208
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