Выбери верные ответы

Определи знак суммы дробей.

1. \(\cfrac{11}{12} +\cfrac{7}{9}\) ; [ \(+\) | \(-\) ].
2. \(\cfrac{-3}{7} +\cfrac{6}{7}\) ; [ \(+\) | \(-\) ].
3. \(\cfrac{-5}{6} +\cfrac{-2}{7}\) ; [ \(+\) | \(-\) ].
4. \(-\cfrac{4}{9} +\cfrac{5}{9}\) ; [ \(+\) | \(-\) ].
5. \(\cfrac{-4}{5} +\cfrac{3}{5}\) ; [ \(+\) | \(-\) ].
6. \(-\cfrac{2}{5} +\cfrac{1}{5}\) ; [ \(+\) | \(-\) ].