When you ask "What number is halfway between 28 and 257?" 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=257.
To find the number halfway between 28 and 257, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 28 and 257 into our formula, we get:
(28 + 257)/2 = 142.5
Thus, the number halfway between 28 and 257 is 142.5.
To check that our answer is correct, we subtract 28 from 142.5 and subtract 142.5 from 257 and compare the two numbers:
142.5 - 28 = 114.5
257 - 142.5 = 114.5
As you can see, the halfway number is 114.5 higher than 28 and 114.5 lower than 257. Therefore, our halfway between answer of 142.5 above is correct.
Halfway Between
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Halfway Between 28 and 258
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