Question

помогите плиз , даю много баллов

Answer 1

6)
$3 frac{7}{11} div ( frac{2}{11} + 2 frac{4}{19} ) = frac{40}{11} div ( frac{38}{209} + 2frac{44}{209} ) = frac{40}{11} div 2 frac{82}{209} = frac{40}{11} div frac{500}{209} = frac{40}{11} times frac{209}{500} = frac{2 times 19}{1 times 25} = frac{38}{25} = 1 frac{13}{25}$
7)
$1 frac{1}{12} div (1 frac{13}{18} - 2 frac{5}{9} ) = frac{13}{12} div ( frac{31}{18} - frac{23}{9} ) = frac{13}{12} div ( frac{31}{18} - frac{46}{18} ) = frac{13}{12} div ( - frac{15}{18} ) = frac{13}{12} div ( - frac{5}{6} ) = frac{13}{12} times ( - frac{6}{5} ) = - frac{13}{10} = - 1 frac{3}{10}$
8)
$( frac{1}{20} + frac{11}{8} ) times frac{18}{5} = ( frac{2}{40} + frac{55}{40} ) times frac{18}{5} = frac{57}{40} times frac{18}{5} = frac{57}{20} times frac{9}{5} = frac{513}{100} = 5 frac{13}{100}$
9)
$( frac{5}{22} - frac{8}{11} ) times frac{11}{5} = ( frac{5}{22} - frac{16}{22} ) times frac{11}{5} = - frac{11}{22} times frac{11}{5} = - frac{1}{2} times frac{11}{5} = - frac{11}{10} = - 1 frac{1}{10}$