When you ask "What number is halfway between 28 and 285?" 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=285.
To find the number halfway between 28 and 285, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 285 into our formula, we get:
(28 + 285)/2 = 156.5
Thus, the number halfway between 28 and 285 is 156.5.
To check that our answer is correct, we subtract 28 from 156.5 and subtract 156.5 from 285 and compare the two numbers:
156.5 - 28 = 128.5
285 - 156.5 = 128.5
As you can see, the halfway number is 128.5 higher than 28 and 128.5 lower than 285. Therefore, our halfway between answer of 156.5 above is correct.
Halfway Between
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Halfway Between 28 and 286
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