When you ask "What number is halfway between 42 and 679?" 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=679.
To find the number halfway between 42 and 679, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 679 into our formula, we get:
(42 + 679)/2 = 360.5
Thus, the number halfway between 42 and 679 is 360.5.
To check that our answer is correct, we subtract 42 from 360.5 and subtract 360.5 from 679 and compare the two numbers:
360.5 - 42 = 318.5
679 - 360.5 = 318.5
As you can see, the halfway number is 318.5 higher than 42 and 318.5 lower than 679. Therefore, our halfway between answer of 360.5 above is correct.
Halfway Between
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Halfway Between 42 and 680
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