Question

Fill in the blanks: (a) \frac{-7}{9} + \\\ = \frac{-7}{9} (b) \\\ \times \frac{11}{-15} = \frac{-11}{15} (c) \frac{-13}{17} + \\\ = 0 (d) \frac{2}{3} \times \\\ = 1