Odpowiedź:
[tex]4 - 2 \frac{2}{5} = \frac{20}{5} - \frac{12}{5} = \frac{8}{5} = 1 \frac{3}{5} \\ 2 - 1 \frac{5}{8} = \frac{16}{8} - \frac{13}{8} = \frac{3}{8} \\ 5 - 3 \frac{1}{7} = \frac{35}{7} - \frac{22}{7} = \frac{13}{7} = 1 \frac{6}{7} [/tex]
[tex]3 \frac{2}{9} - 1 \frac{5}{6} = \frac{29}{9} - \frac{11}{6} = \frac{58}{18} - \frac{33}{18} = \frac{25}{18} = 1 \frac{7}{18} [/tex]
[tex]5 \frac{2}{7} - 2 \frac{3}{4} = \frac{37}{7} - \frac{11}{4} = \frac{148}{28} - \frac{77}{28} = \frac{71}{28} = 2 \frac{15}{28} \\ 2 \frac{1}{3} - 1 \frac{5}{7} = \frac{7}{3} - \frac{12}{7} = \frac{49}{21} - \frac{36}{21} = \frac{13}{21} [/tex]
