Μετατροπή δεκαδικών σε κλάσματα και αντίστροφα

 http://atheo.gr/3-%ce%bf%ce%b9-%ce%b1%cf%81%ce%b9%ce%b8%ce%bc%ce%bf%ce%af-%ce%b1%ce%bb%ce%bb%ce%ac%ce%b6%ce%bf%cf%85%ce%bd-%ce%b5%ce%bc%cf%86%ce%ac%ce%bd%ce%b9%cf%83%ce%b7-%ce%bc%ce%b5%cf%84%ce%b1%cf%84%cf%81%ce%bf/

http://sainia.gr/2012-09-10-14-03-25/2012-02-20-18-01-06/2011-10-01-09-54-30/1163-metatropi-dekadikon-se-klasmata-kai-antistrofa-20-09-13

http://www.slideboom.com/presentations/831293/%CE%9C%CE%B5%CF%84%CE%B1%CF%84%CF%81%CE%BF%CF%80%CE%AE-%CE%B4%CE%B5%CE%BA%CE%B1%CE%B4%CE%B9%CE%BA%CF%8E%CE%BD-%CF%83%CE%B5-%CE%BA%CE%BB%CE%AC%CF%83%CE%BC%CE%B1%CF%84%CE%B1-%CE%BA%CE%B1%CE%B9-%CE%B1%CE%BD%CF%84%CE%AF%CF%83%CF%84%CF%81%CE%BF%CF%86%CE%B1