When you ask "What number is halfway between 3 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=3 and Y=842.
To find the number halfway between 3 and 842, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 3 and 842 into our formula, we get:
(3 + 842)/2 = 422.5
Thus, the number halfway between 3 and 842 is 422.5.
To check that our answer is correct, we subtract 3 from 422.5 and subtract 422.5 from 842 and compare the two numbers:
422.5 - 3 = 419.5
842 - 422.5 = 419.5
As you can see, the halfway number is 419.5 higher than 3 and 419.5 lower than 842. Therefore, our halfway between answer of 422.5 above is correct.
Halfway Between
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Halfway Between 3 and 843
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