When you ask "What number is halfway between 42 and 873?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=42 and Y=873.
To find the number halfway between 42 and 873, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 873 into our formula, we get:
(42 + 873)/2 = 457.5
Thus, the number halfway between 42 and 873 is 457.5.
To check that our answer is correct, we subtract 42 from 457.5 and subtract 457.5 from 873 and compare the two numbers:
457.5 - 42 = 415.5
873 - 457.5 = 415.5
As you can see, the halfway number is 415.5 higher than 42 and 415.5 lower than 873. Therefore, our halfway between answer of 457.5 above is correct.
Halfway Between
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Halfway Between 42 and 874
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