When you ask "What number is halfway between 75 and 684?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=75 and Y=684.
To find the number halfway between 75 and 684, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 75 and 684 into our formula, we get:
(75 + 684)/2 = 379.5
Thus, the number halfway between 75 and 684 is 379.5.
To check that our answer is correct, we subtract 75 from 379.5 and subtract 379.5 from 684 and compare the two numbers:
379.5 - 75 = 304.5
684 - 379.5 = 304.5
As you can see, the halfway number is 304.5 higher than 75 and 304.5 lower than 684. Therefore, our halfway between answer of 379.5 above is correct.
Halfway Between
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Halfway Between 75 and 685
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