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[tex]( \frac{11}{45 } - \frac{1}{30} ) \times \frac{18}{19 } [/tex]


Răspuns :

[tex](\frac{18}{45} -\frac{1}{30})*\frac{18}{19} = \frac{19}{90}*\frac{18}{90} = \frac{1}{5}[/tex]