When you ask "What number is halfway between 22 and 823?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=22 and Y=823.
To find the number halfway between 22 and 823, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 22 and 823 into our formula, we get:
(22 + 823)/2 = 422.5
Thus, the number halfway between 22 and 823 is 422.5.
To check that our answer is correct, we subtract 22 from 422.5 and subtract 422.5 from 823 and compare the two numbers:
422.5 - 22 = 400.5
823 - 422.5 = 400.5
As you can see, the halfway number is 400.5 higher than 22 and 400.5 lower than 823. Therefore, our halfway between answer of 422.5 above is correct.
Halfway Between
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Halfway Between 22 and 824
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