Odpowiedź:
[tex] \frac{7}{9} + \frac{6}{7} = \frac{49}{63} + \frac{54}{63 } = \frac{103}{63} = 1 \frac{40}{63} [/tex]
[tex] \frac{5}{6} \div \frac{7}{10} = \frac{5}{6} \times \frac{10}{7} = \frac{5}{3} \times \frac{5}{7} = \frac{25}{21} = 1 \frac{4}{21} [/tex]
[tex] \frac{3}{4} - \frac{1}{3} = \frac{9}{12} - \frac{4}{12} = \frac{5}{12} [/tex]
[tex] \frac{4}{8} \times \frac{6}{8} = \frac{1}{4} \times \frac{3}{2} = \frac{3}{8} [/tex]
