When you ask "What number is halfway between 87 and 768?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=87 and Y=768.
To find the number halfway between 87 and 768, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 768 into our formula, we get:
(87 + 768)/2 = 427.5
Thus, the number halfway between 87 and 768 is 427.5.
To check that our answer is correct, we subtract 87 from 427.5 and subtract 427.5 from 768 and compare the two numbers:
427.5 - 87 = 340.5
768 - 427.5 = 340.5
As you can see, the halfway number is 340.5 higher than 87 and 340.5 lower than 768. Therefore, our halfway between answer of 427.5 above is correct.
Halfway Between
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Halfway Between 87 and 769
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