Odpowiedź:
[tex]a)5 \frac{2}{3} + 2 \frac{3}{4} = 5 \frac{8}{12} + 2 \frac{9}{12} = 7 \frac{17}{12} = 8 \frac{5}{12} [/tex]
[tex]b)6 \frac{1}{2} - 2 \frac{7}{9} = 6 \frac{9}{18} - 2 \frac{14}{18} = 3 \frac{13}{18} [/tex]
[tex]c)1 \frac{1}{5} \times 2 \frac{2}{9} = \frac{6}{5} \times \frac{20}{9} = \frac{8}{3} = 2 \frac{2}{3} [/tex]
[tex]d) \frac{2}{5} \div 8 = \frac{2}{5} \times \frac{1}{8} = \frac{1}{20} [/tex]
