Solve the following arithmetic problems: 5. -1/9 6. 3/7 : (-3)

Решение:

1. Задание 5:
   \( -1 \div 9 = -\frac{1}{9} \)
2. Задание 6:
   \( \frac{3}{7} \div (-3) = \frac{3}{7} \times \frac{1}{-3} = \frac{3 \times 1}{7 \times (-3)} = \frac{3}{-21} = -\frac{1}{7} \)

Ответ: 5. -1/9; 6. -1/7.