When you ask "What number is halfway between 42 and 673?" 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=673.
To find the number halfway between 42 and 673, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 673 into our formula, we get:
(42 + 673)/2 = 357.5
Thus, the number halfway between 42 and 673 is 357.5.
To check that our answer is correct, we subtract 42 from 357.5 and subtract 357.5 from 673 and compare the two numbers:
357.5 - 42 = 315.5
673 - 357.5 = 315.5
As you can see, the halfway number is 315.5 higher than 42 and 315.5 lower than 673. Therefore, our halfway between answer of 357.5 above is correct.
Halfway Between
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Halfway Between 42 and 674
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