Răspuns:
[tex]1) a) \frac{13}{11} \\ b) \frac{7}{16} \\ 5 \frac{2}{9} = \frac{5 \times 9 + 2}{9} = \frac{47}{9} \\ c) \frac{7}{49} \\ 7 \frac{1}{7} = \frac{7 \times 7 + 1}{7} = \frac{50}{7} \\ d) \frac{7}{50} [/tex]
[tex]2)a) \frac{3}{4} \div \frac{2}{5} = \frac{3}{4} \times \frac{5}{2} = \frac{15}{8} \\ b) \frac{4}{7} \div \frac{5}{11} = \frac{4}{7} \times \frac{11}{5} = \frac{44}{35} \\ c) \frac{7}{25} \div \frac{23}{25} = \frac{7}{25} \times \frac{25}{23} = \frac{7}{1} \times \frac{1}{23} = \frac{7}{23} \\ d) \frac{3}{17} \div \frac{8}{17} = \frac{3}{17} \times \frac{17}{8} = \frac{3}{1} \times \frac{1}{8} = \frac{3}{8} \\ e) \frac{8}{75} \div \frac{11}{25} = \frac{8}{75} \times \frac{25}{11} = \frac{8}{3} \times \frac{1}{11} = \frac{8}{33} \\ f) \frac{13}{36} \div \frac{13}{11} = \frac{13}{36} \times \frac{11}{13} = \frac{1}{36} \times \frac{11}{1} = \frac{11}{36} \\ g) \frac{16}{19} \div \frac{16}{47} = \frac{16}{19} \times \frac{47}{16} = \frac{1}{19} \times \frac{47}{1} = \frac{47}{19} \\ h) \frac{66}{13} \div \frac{33}{5} = \frac{66}{13} \times \frac{5}{33} = \frac{2}{13} \times \frac{5}{1} = \frac{10}{13} [/tex]
