2015-09-09T16:13:43ZFluxBBhttp://www.mathisfunforum.com/viewtopic.php?id=22381You haven't proven the closure of the rational numbers under addition nor multiplication: you've only shown some examples. You'd need to show that the sum and product of two rational numbers a/b and c/d is also rational.]]>http://www.mathisfunforum.com/profile.php?id=2060892015-09-09T16:13:43Zhttp://www.mathisfunforum.com/viewtopic.php?pid=367338#p367338Hi;
Welcome to the forum.
]]>http://www.mathisfunforum.com/profile.php?id=337902015-07-22T01:55:09Zhttp://www.mathisfunforum.com/viewtopic.php?pid=364722#p364722Hi here is a video that help understand rational numbers and its properties