When you ask "What number is halfway between 10 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=10 and Y=787.
To find the number halfway between 10 and 787, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 10 and 787 into our formula, we get:
(10 + 787)/2 = 398.5
Thus, the number halfway between 10 and 787 is 398.5.
To check that our answer is correct, we subtract 10 from 398.5 and subtract 398.5 from 787 and compare the two numbers:
398.5 - 10 = 388.5
787 - 398.5 = 388.5
As you can see, the halfway number is 388.5 higher than 10 and 388.5 lower than 787. Therefore, our halfway between answer of 398.5 above is correct.
Halfway Between
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Halfway Between 10 and 788
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