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1+ 5 supra 9 
2+13 supra 7


Răspuns :

1953125 62748517 1953125+62748517=64701642
[tex]1+ \frac{5}{9} (aducem~la~acelasi~numitor)= \frac{9}{9}+ \frac{5}{9}= \frac{14}{9} \\ \\ 2+ \frac{13}{7}(aducem~la~acelasi~numitor)= \frac{14}{7}+ \frac{13}{7}= \frac{27}{7} [/tex]