When you ask "What number is halfway between 28 and 987?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=28 and Y=987.
To find the number halfway between 28 and 987, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 987 into our formula, we get:
(28 + 987)/2 = 507.5
Thus, the number halfway between 28 and 987 is 507.5.
To check that our answer is correct, we subtract 28 from 507.5 and subtract 507.5 from 987 and compare the two numbers:
507.5 - 28 = 479.5
987 - 507.5 = 479.5
As you can see, the halfway number is 479.5 higher than 28 and 479.5 lower than 987. Therefore, our halfway between answer of 507.5 above is correct.
Halfway Between
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Halfway Between 28 and 988
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