Răspuns :
Salutare!:)
[tex] a) \\ \frac{2}{7} + \frac{5}{7} = \frac{2 + 5}{7} = \frac{7}{7} = 7 \div 7 = 1 \\ \\ b) \\ \frac{3}{11} + \frac{6}{11} + \frac{2}{11} = \frac{3 + 6 + 2}{11} = \frac{11}{11} = 11 \div 11 = 1[/tex]
Salutare!:)
[tex] a) \\ \frac{2}{7} + \frac{5}{7} = \frac{2 + 5}{7} = \frac{7}{7} = 7 \div 7 = 1 \\ \\ b) \\ \frac{3}{11} + \frac{6}{11} + \frac{2}{11} = \frac{3 + 6 + 2}{11} = \frac{11}{11} = 11 \div 11 = 1[/tex]