Odpowiedź:
[tex] \frac{1}{2} \times ( \frac{4}{5} + 1 \frac{1}{5} ) = \frac{1}{2} \times 2 = 1[/tex]
[tex]( \frac{15}{20} - \frac{4}{20} ) \div \frac{1}{2} = \frac{11}{20} \times \frac{2}{1} = \frac{22}{20} = 1 \frac{1}{10} [/tex]
[tex](1 \frac{2}{10} - \frac{5}{10} ) \times \frac{10}{3} = \frac{7}{10} \times \frac{10}{3} = 2 \frac{1}{3} [/tex]
[tex](5 \frac{6}{10} - 3 \frac{1}{10} ) \div \frac{7}{2} = 2 \frac{5}{10} \div \frac{7}{2} = \frac{25}{10} \times \frac{2}{7} = \frac{50}{70} = \frac{5}{7} [/tex]
