Ребятишки) Помогите. Срочно.

1) $8,5- \frac{1}{3} = 8 \frac{1}{2} - \frac{1}{3} = 8 \frac{3}{6} - \frac{2}{6} = 8 \frac{1}{6} = \frac{49}{6}$
2) $4 \frac{1}{9} + 1,8 = 4 \frac{1}{9} + 1 \frac{4}{5} = 4 \frac{5}{45} + 1 \frac{36}{45} = 5 \frac{41}{45} = \frac{266}{45}$
3) $\frac{1}{9} * 0,12 = \frac{1}{9} * \frac{3}{25} = \frac{1}{75}$
4) $\frac{6}{7} : 0,6 = \frac{6}{7} * \frac{10}{6} = \frac{6}{7} * \frac{5}{3} = \frac{10}{7}$