When you ask "What number is halfway between 50 and 857?" 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=857.
To find the number halfway between 50 and 857, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 50 and 857 into our formula, we get:
(50 + 857)/2 = 453.5
Thus, the number halfway between 50 and 857 is 453.5.
To check that our answer is correct, we subtract 50 from 453.5 and subtract 453.5 from 857 and compare the two numbers:
453.5 - 50 = 403.5
857 - 453.5 = 403.5
As you can see, the halfway number is 403.5 higher than 50 and 403.5 lower than 857. Therefore, our halfway between answer of 453.5 above is correct.
Halfway Between
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Halfway Between 50 and 858
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