85/91×5 6/17÷(5/7÷8) (15÷5/15)÷(3 3/8×4/27) 15×(8/45÷16)× 24 1/2 Дам дополнительно балы...

Решите задачу:

$1. \frac{85}{91} \times 5 \frac{6}{17} \div ( \frac{5}{7} \div 8) =56 \\ 1) \frac{5}{7} \times \frac{1}{8} = \frac{5}{56} \\ 2) \frac{91}{17} \times \frac{56}{5} = \frac{5096}{85} \\ 3) \frac{85}{91} \times \frac{5096}{85} = 56 \\ 2.(15 \div \frac{5}{15}) \div (3 \frac{3}{8} \times \frac{4}{27}) =90 \\ 1) \frac{15}{1} \times \frac{15}{5} = 45 \\ 2) \frac{27}{8} \times \frac{4}{27} = \frac{4}{8} = 0.5 \\ 3)45 \div 0.5 = 90 \\ 3.15 \times ( \frac{8}{45} \div 16) \times 24 \frac{1}{2} = \frac{49}{12} \\ 1) \frac{8}{45} \times \frac{1}{16} = \frac{1}{90} \\ 2) \frac{15}{1} \times \frac{1}{90} = \frac{1}{6} \\ 3) \frac{1}{6} \times \frac{49}{2} = \frac{49}{12}$