When you ask "What number is halfway between 42 and 739?" 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=739.
To find the number halfway between 42 and 739, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 739 into our formula, we get:
(42 + 739)/2 = 390.5
Thus, the number halfway between 42 and 739 is 390.5.
To check that our answer is correct, we subtract 42 from 390.5 and subtract 390.5 from 739 and compare the two numbers:
390.5 - 42 = 348.5
739 - 390.5 = 348.5
As you can see, the halfway number is 348.5 higher than 42 and 348.5 lower than 739. Therefore, our halfway between answer of 390.5 above is correct.
Halfway Between
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Halfway Between 42 and 740
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