When you ask "What number is halfway between 82 and 423?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=82 and Y=423.
To find the number halfway between 82 and 423, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 82 and 423 into our formula, we get:
(82 + 423)/2 = 252.5
Thus, the number halfway between 82 and 423 is 252.5.
To check that our answer is correct, we subtract 82 from 252.5 and subtract 252.5 from 423 and compare the two numbers:
252.5 - 82 = 170.5
423 - 252.5 = 170.5
As you can see, the halfway number is 170.5 higher than 82 and 170.5 lower than 423. Therefore, our halfway between answer of 252.5 above is correct.
Halfway Between
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Halfway Between 82 and 424
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