When you ask "What number is halfway between 83 and 398?" 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=398.
To find the number halfway between 83 and 398, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 83 and 398 into our formula, we get:
(83 + 398)/2 = 240.5
Thus, the number halfway between 83 and 398 is 240.5.
To check that our answer is correct, we subtract 83 from 240.5 and subtract 240.5 from 398 and compare the two numbers:
240.5 - 83 = 157.5
398 - 240.5 = 157.5
As you can see, the halfway number is 157.5 higher than 83 and 157.5 lower than 398. Therefore, our halfway between answer of 240.5 above is correct.
Halfway Between
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Halfway Between 83 and 399
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