Question

помогите плиз , даю много баллов

Answer 1

6)
$3 \frac{7}{11} \div ( \frac{2}{11} + 2 \frac{4}{19} ) = \frac{40}{11} \div ( \frac{38}{209} + 2\frac{44}{209} ) = \frac{40}{11} \div 2 \frac{82}{209} = \frac{40}{11} \div \frac{500}{209} = \frac{40}{11} \times \frac{209}{500} = \frac{2 \times 19}{1 \times 25} = \frac{38}{25} = 1 \frac{13}{25}$
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)
$( \frac{5}{22} - \frac{8}{11} ) \times \frac{11}{5} = ( \frac{5}{22} - \frac{16}{22} ) \times \frac{11}{5} = - \frac{11}{22} \times \frac{11}{5} = - \frac{1}{2} \times \frac{11}{5} = - \frac{11}{10} = - 1 \frac{1}{10}$