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[tex] \frac{1}{3} + \frac{2}{5}= [/tex]

Răspuns :

1/3+2/5=(5+6)/15=11/15
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[tex] \frac{1}{3} + \frac{2}{5}(aduc~la~acelasi~numitor.Numitor~comun:15)= \frac{5}{15}+ \frac{6}{15}= \frac{11}{15} [/tex]