When you ask "What number is halfway between 28 and 287?" 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=287.
To find the number halfway between 28 and 287, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 287 into our formula, we get:
(28 + 287)/2 = 157.5
Thus, the number halfway between 28 and 287 is 157.5.
To check that our answer is correct, we subtract 28 from 157.5 and subtract 157.5 from 287 and compare the two numbers:
157.5 - 28 = 129.5
287 - 157.5 = 129.5
As you can see, the halfway number is 129.5 higher than 28 and 129.5 lower than 287. Therefore, our halfway between answer of 157.5 above is correct.
Halfway Between
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Halfway Between 28 and 288
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