When you ask "What number is halfway between 50 and 687?" 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=687.
To find the number halfway between 50 and 687, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 50 and 687 into our formula, we get:
(50 + 687)/2 = 368.5
Thus, the number halfway between 50 and 687 is 368.5.
To check that our answer is correct, we subtract 50 from 368.5 and subtract 368.5 from 687 and compare the two numbers:
368.5 - 50 = 318.5
687 - 368.5 = 318.5
As you can see, the halfway number is 318.5 higher than 50 and 318.5 lower than 687. Therefore, our halfway between answer of 368.5 above is correct.
Halfway Between
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Halfway Between 50 and 688
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