Odpowiedź:
[tex]1 \frac{2}{5} \times 2 \frac{1}{7} = \frac{7}{5} \times \frac{15}{7} = \frac{15}{5} = 3[/tex]
[tex]3 \frac{1}{5} \div 12 = \frac{16}{5} \times \frac{1}{12} = \frac{4}{15} [/tex]
[tex]4 \frac{1}{6} \div 1 \frac{2}{3} = \frac{25}{6} \times \frac{3}{5} = \frac{5}{2} = 2\frac{1}{2} [/tex]
