When you ask "What number is halfway between 50 and 85?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=50 and Y=85.
To find the number halfway between 50 and 85, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 50 and 85 into our formula, we get:
(50 + 85)/2 = 67.5
Thus, the number halfway between 50 and 85 is 67.5.
To check that our answer is correct, we subtract 50 from 67.5 and subtract 67.5 from 85 and compare the two numbers:
67.5 - 50 = 17.5
85 - 67.5 = 17.5
As you can see, the halfway number is 17.5 higher than 50 and 17.5 lower than 85. Therefore, our halfway between answer of 67.5 above is correct.
Halfway Between
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Halfway Between 50 and 86
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