Помогите решить это примеры

Решите задачу:

$1)4 \frac{3}{4} = \frac{19}{4} \\ \frac{19}{4} \div 3 = \frac{19}{4} \times \frac{1}{3} = \frac{19}{12} = 1 \frac{7}{12 } \\ 2)1 \div \frac{3}{11} = 1 \times \frac{11}{3} = 3 \frac{2}{3} \\ 3)0 \div 5 \frac{1}{18} = 0 \\ 4)3 \frac{1}{4} \div 1 = 3 \frac{1}{4} \\5) 3 \frac{1}{4} = \frac{13}{4} \\ 1 \frac{5}{31} = \frac{36}{31 } \\ \frac{13}{4} \div \frac{36}{31} = \frac{13}{4} \times \frac{31}{36} = \frac{403}{144} = 2 \frac{115}{144} \\$
$6) \frac{4}{25} = \frac{16}{100} = 0.16 \\ 0.16 \div 0.2 = 0.8$