When you ask "What number is halfway between 83 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=83 and Y=684.
To find the number halfway between 83 and 684, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 83 and 684 into our formula, we get:
(83 + 684)/2 = 383.5
Thus, the number halfway between 83 and 684 is 383.5.
To check that our answer is correct, we subtract 83 from 383.5 and subtract 383.5 from 684 and compare the two numbers:
383.5 - 83 = 300.5
684 - 383.5 = 300.5
As you can see, the halfway number is 300.5 higher than 83 and 300.5 lower than 684. Therefore, our halfway between answer of 383.5 above is correct.
Halfway Between
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Halfway Between 83 and 685
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