Question

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Answer 1

$11)( \frac{ - 3}{6}) + ( \frac{ - 5}{6} ) = - \frac{4}{3}$

$12)( \frac{3}{4}) \times ( \frac{2}{3}) = \frac{1}{2}$

$13)5 \times \frac{2}{3} = \frac{10}{3}$

$14)( \frac{ - 2}{5}) \times ( \frac{ - 3}{2}) = \frac{3}{5}$

$15)( \frac{ + 4}{3}) \times ( \frac{ - 5}{7}) = - \frac{20}{21}$

Espero que esteja certa!!