When you ask "What number is halfway between 21 and 587?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=21 and Y=587.
To find the number halfway between 21 and 587, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 21 and 587 into our formula, we get:
(21 + 587)/2 = 304
Thus, the number halfway between 21 and 587 is 304.
To check that our answer is correct, we subtract 21 from 304 and subtract 304 from 587 and compare the two numbers:
304 - 21 = 283
587 - 304 = 283
As you can see, the halfway number is 283 higher than 21 and 283 lower than 587. Therefore, our halfway between answer of 304 above is correct.
Halfway Between
Find halfway between two other numbers here!
Halfway Between 21 and 588
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