Explicație pas cu pas:
[tex] \frac{12}{10} - \frac{1}{9} \times ( \frac{3}{5} - \frac{4}{10} \times ( - 3)) \\ \\ = \frac{12}{10} - \frac{1}{9} \times ( \frac{3}{5} + \frac{12}{10} ) \: pentru \: ca \: - \: cu - \: fac \: + \\ \\ = \frac{12}{10} - \frac{1}{9} \times ( \frac{6}{10} + \frac{12}{10}) \\ \\ \frac{12}{10} - \frac{1}{9} \times \frac{18}{10} = \\ \\ \frac{12}{10} - \frac{2}{10} = \frac{10}{10} = 1[/tex]
