Помогите сделать 1.001

Решите задачу:

$1)7-6,35=7-6\frac{35}{100}=7-6\frac{7}{20}=7-\frac{127}{20}=\frac{7*20-127}{20}=\frac{13}{20} \\ \\ 2)\frac{13}{20}:6,5=\frac{13}{20}:6\frac{5}{10}=\frac{13}{20}:6\frac{1}{2}=\frac{13}{20}:\frac{13}{2}=\frac{13}{20}*\frac{2}{13}=\frac{1}{10} \\ \\ 3)\frac{1}{10}+9,9=\frac{1}{10}+\frac{99}{10}=\frac{100}{10}=10$

$4)1,2:36=\frac{12}{10}*\frac{1}{36}=\frac{1}{30} \\ \\ 5)1,2:0,25=\frac{12}{10}:\frac{25}{100}=\frac{12}{10}*\frac{100}{25}=\frac{24}{5}=4\frac{4}{5} \\ \\ 6)\frac{1}{30}+\frac{24}{5}-1\frac{5}{16}=\frac{1}{30}+\frac{24}{5}-\frac{21}{16}=\frac{1*8+24*48-21*15}{240}=\frac{845}{240}=\frac{169}{48}=3 \frac{25}{48} \\ \\ 7)\frac{169}{48}:\frac{169}{24}=\frac{169}{48}*\frac{24}{169}= \frac{1}{2} \\ \\ 8) 10:\frac{1}{2}= 10*2=20$