Ответ:

[tex]m(9 - 5) = 4m \\ 4 \times ( - 4) = 16 \\ \\ - x - 9 = - 1.3 - 9 = - 10.3 \\ \\ - 2.1a \times ( - 10) \times 2 \frac{1}{3} = \frac{21a \times 7}{3} = 49a \\ 49 \times - 1 \frac{1}{7} = \frac{49 \times ( - 8)}{7} = - 56 \\ \\ - 2 \frac{2}{5} x \times \frac{3}{7} y = \frac{ - 12xy3}{5 \times 7} \\ \frac{ - 12 \times( - 7) \times 5 \times 3 }{5 \times 7 \times 4} = 9[/tex]