When you ask "What number is halfway between 8 and 531?" 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=531.
To find the number halfway between 8 and 531, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 8 and 531 into our formula, we get:
(8 + 531)/2 = 269.5
Thus, the number halfway between 8 and 531 is 269.5.
To check that our answer is correct, we subtract 8 from 269.5 and subtract 269.5 from 531 and compare the two numbers:
269.5 - 8 = 261.5
531 - 269.5 = 261.5
As you can see, the halfway number is 261.5 higher than 8 and 261.5 lower than 531. Therefore, our halfway between answer of 269.5 above is correct.
Halfway Between
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Halfway Between 8 and 532
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