When you ask "What number is halfway between 87 and 776?" 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=776.
To find the number halfway between 87 and 776, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 776 into our formula, we get:
(87 + 776)/2 = 431.5
Thus, the number halfway between 87 and 776 is 431.5.
To check that our answer is correct, we subtract 87 from 431.5 and subtract 431.5 from 776 and compare the two numbers:
431.5 - 87 = 344.5
776 - 431.5 = 344.5
As you can see, the halfway number is 344.5 higher than 87 and 344.5 lower than 776. Therefore, our halfway between answer of 431.5 above is correct.
Halfway Between
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