When you ask "What number is halfway between 23 and 842?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=23 and Y=842.
To find the number halfway between 23 and 842, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 23 and 842 into our formula, we get:
(23 + 842)/2 = 432.5
Thus, the number halfway between 23 and 842 is 432.5.
To check that our answer is correct, we subtract 23 from 432.5 and subtract 432.5 from 842 and compare the two numbers:
432.5 - 23 = 409.5
842 - 432.5 = 409.5
As you can see, the halfway number is 409.5 higher than 23 and 409.5 lower than 842. Therefore, our halfway between answer of 432.5 above is correct.
Halfway Between
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Halfway Between 23 and 843
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