When you ask "What number is halfway between 25 and 822?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=25 and Y=822.
To find the number halfway between 25 and 822, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 25 and 822 into our formula, we get:
(25 + 822)/2 = 423.5
Thus, the number halfway between 25 and 822 is 423.5.
To check that our answer is correct, we subtract 25 from 423.5 and subtract 423.5 from 822 and compare the two numbers:
423.5 - 25 = 398.5
822 - 423.5 = 398.5
As you can see, the halfway number is 398.5 higher than 25 and 398.5 lower than 822. Therefore, our halfway between answer of 423.5 above is correct.
Halfway Between
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Halfway Between 25 and 823
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