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Message: <blockquote data-quote="Victor" data-source="post: 1586583" data-attributes="member: 214710">The classical approach is to consider the meaning of division.  For example, 20/4 can be interpreted as "how many time do we need to subtract 4 from 20 to reduce it to zero?"  The answer is 5.Apply this to your problem; "how many times do we need to subtract zero from 1 to reduce it to zero?"The answer is "a very very large number of times that cannot be counted because the subtraction has no effect on the initial number."For a negative number, the process is the same but requires addition instead of subtraction.  So (-20)/5 needs -4 subtractions.The concepts of plus-infinity and minus-infinity have no meaning, even if you wish to consider (-1)/0, except it is sometimes useful to consider the value of the initial number.  The answer is still the same.</blockquote>