When you ask "What number is halfway between 55 and 486?" we assume you mean the number in the exact middle of the two numbers on a number line, as illustrated below, where X=55 and Y=486.
To find the number halfway between 55 and 486, we use the following formula:
(X + Y)/2 = Halfway Between
When we enter 55 and 486 into our formula, we get:
(55 + 486)/2 = 270.5
Thus, the number halfway between 55 and 486 is 270.5.
To check that our answer is correct, we subtract 55 from 270.5 and subtract 270.5 from 486 and compare the two numbers:
270.5 - 55 = 215.5
486 - 270.5 = 215.5
As you can see, the halfway number is 215.5 higher than 55 and 215.5 lower than 486. Therefore, our halfway between answer of 270.5 above is correct.
Halfway Between
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Halfway Between 55 and 487
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