When you ask "What number is halfway between 42 and 787?" 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=787.
To find the number halfway between 42 and 787, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 42 and 787 into our formula, we get:
(42 + 787)/2 = 414.5
Thus, the number halfway between 42 and 787 is 414.5.
To check that our answer is correct, we subtract 42 from 414.5 and subtract 414.5 from 787 and compare the two numbers:
414.5 - 42 = 372.5
787 - 414.5 = 372.5
As you can see, the halfway number is 372.5 higher than 42 and 372.5 lower than 787. Therefore, our halfway between answer of 414.5 above is correct.
Halfway Between
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Halfway Between 42 and 788
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