When you ask "What number is halfway between 8 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=8 and Y=257.
To find the number halfway between 8 and 257, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 257 into our formula, we get:
(8 + 257)/2 = 132.5
Thus, the number halfway between 8 and 257 is 132.5.
To check that our answer is correct, we subtract 8 from 132.5 and subtract 132.5 from 257 and compare the two numbers:
132.5 - 8 = 124.5
257 - 132.5 = 124.5
As you can see, the halfway number is 124.5 higher than 8 and 124.5 lower than 257. Therefore, our halfway between answer of 132.5 above is correct.
Halfway Between
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Halfway Between 8 and 258
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