Question

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Answer 1

$\frac{5}{7} - 0.4 + \frac{11}{14} = \frac{5}{7} - \frac{2}{5} + \frac{11}{14} = \\ = \frac{10 + 11}{14} - \frac{2}{5} = \frac{21}{14} - \frac{2}{5} = \\ = \frac{3}{2} - \frac{2}{5} = \frac{15 - 4}{10} = \frac{11}{10} = 1.1$