When you ask "What number is halfway between 87 and 880?" 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=880.
To find the number halfway between 87 and 880, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 87 and 880 into our formula, we get:
(87 + 880)/2 = 483.5
Thus, the number halfway between 87 and 880 is 483.5.
To check that our answer is correct, we subtract 87 from 483.5 and subtract 483.5 from 880 and compare the two numbers:
483.5 - 87 = 396.5
880 - 483.5 = 396.5
As you can see, the halfway number is 396.5 higher than 87 and 396.5 lower than 880. Therefore, our halfway between answer of 483.5 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 87 and 881
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