[tex]A = 5 \div 3 = \frac{5}{3} [/tex]
[tex]B = 1 \div \frac{7}{12} = \frac{12}{7} [/tex]
[tex]C = \frac{ - 1}{5} \div 4 = - \frac{1}{5} \times \frac{1}{4} = - \frac{1}{20} [/tex]
[tex]D = - 4 \div \frac{ - 7}{3} = - 4 \times \frac{3}{ - 7} = \frac{12}{7} [/tex]
[tex]E = \frac{ - 70}{12} \div \frac{14}{ - 6} = - \frac{70}{12} \times - \frac{6}{14} \\ = \frac{70}{14} \times \frac{6}{12} \\ = \frac{5}{2} [/tex]
[tex]J = ( \frac{1}{8} - \frac{7}{12} ) \div ( \frac{7}{6} + \frac{7}{16} ) \\ = ( \frac{3}{24} - \frac{14}{24} ) \div ( \frac{56}{48} + \frac{21}{48} ) \\ = - \frac{11}{24} \div \frac{77}{48} \\ = - \frac{11}{24} \times \frac{48}{77} \\ = - \frac{11}{77} \times \frac{48}{24} \\ = - \frac{2}{7} [/tex]
[tex]K = \frac{1}{8} - \frac{7}{12} \div \frac{7}{6} + \frac{7}{12} \\ = \frac{1}{8} - \frac{7}{12} \times \frac{6}{7} + \frac{7}{12} \\ = \frac{1}{8} - \frac{1}{2} + \frac{7}{12} \\ = \frac{3}{24} - \frac{12}{24} + \frac{14}{24} \\ = \frac{5}{24} [/tex]
[tex]N = \frac{ \frac{5}{3} - \frac{7}{9} }{ \frac{1}{4} - \frac{1}{2} } = \frac{ \frac{15}{9} - \frac{7}{9} }{ \frac{1}{4} - \frac{2}{4} } = \frac{ \frac{8}{9} }{ - \frac{1}{4} } = \frac{8}{9} \times ( - 4) = - \frac{32}{9} [/tex]
