When you ask "What number is halfway between 87 and 1000?" 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=1000.
To find the number halfway between 87 and 1000, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 1000 into our formula, we get:
(87 + 1000)/2 = 543.5
Thus, the number halfway between 87 and 1000 is 543.5.
To check that our answer is correct, we subtract 87 from 543.5 and subtract 543.5 from 1000 and compare the two numbers:
543.5 - 87 = 456.5
1000 - 543.5 = 456.5
As you can see, the halfway number is 456.5 higher than 87 and 456.5 lower than 1000. Therefore, our halfway between answer of 543.5 above is correct.
Halfway Between
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