Răspuns:
1
Explicație pas cu pas:
[tex] \frac{2}{7} \times \frac{14}{10} + \frac{4}{9} \div \frac{10}{9} + \frac{5 {}^{2} }{ {5}^{3} } = \frac{2}{7} \times \frac{14}{10} + \frac{4}{9} \times \frac{9}{10} + \frac{ {5}^{2} }{ {5}^{3} } = \frac{2}{5} + 2 \times \frac{1}{5} + \frac{1}{5} = \frac{2}{5} + \frac{2}{5} + \frac{1}{5} = \frac{5}{5} = 1 [/tex]