Odpowiedź:
[tex]a) \: 5 \frac{1}{9} - 1 \frac{7}{9} + 4 \frac{8}{9} - 2 \frac{2}{9} = 4 \frac{10}{9} - 1 \frac{7}{9} + 4 \frac{8}{9} - 2 \frac{2}{9} = 6[/tex]
[tex]b) \: 3 \frac{5}{7} - 1 \frac{6}{7} + 15 \frac{4}{7} - 5 \frac{6}{7} = 2 \frac{12}{7} - 1 \frac{6}{7} + 15 \frac{4}{7} - 5 \frac{6}{7} = 11 [/tex]
[tex]c) \: 7 \frac{9}{15} + 3 \frac{2}{15} - 4 \frac{1}{15} - \frac{6}{15} = 6 \frac{4}{15} [/tex]
[tex]d) \: 3 \frac{8}{9} - 1 \frac{3}{9} + 4 \frac{5}{9} - 5 \frac{8}{9} = 1 \frac{2}{9} [/tex]
[tex]e) \: 4 \frac{5}{13} - 1 \frac{5}{13} + 6 \frac{2}{13} - 1 \frac{11}{13} = 7 \frac{4}{13} [/tex]
[tex]f) \: 35 \frac{2}{19} - 15 \frac{6}{19} - 4 \frac{7}{19} - 1 \frac{18}{19} = 11 \frac{1}{19} [/tex]
[tex]g) \: 6 - 2 \frac{1}{11} - 1 \frac{10}{11} + 9 \frac{9}{11} = 11 \frac{9}{11} [/tex]
[tex]h) \: 7 \frac{1}{21} + 4 - 5 \frac{13}{21} + 4 \frac{2}{21} = 9 \frac{11}{21} [/tex]
[tex]i) \: 5 \frac{3}{37} + 9 \frac{1}{37} - 4 \frac{25}{37} - 2 \frac{27}{37} = 6 \frac{26}{37} [/tex]
[tex]j) \: 12 \frac{1}{33} - 3 \frac{7}{33} - 5 \frac{29}{33} + 4 \frac{7}{33} = 9 \frac{12}{33} [/tex]
[tex]k) \: 13 \frac{1}{3} - 5 \frac{2}{3} + 1 \frac{1}{3} - 4 \frac{2}{3} = 4 \frac{1}{3} [/tex]
[tex]l) \: 25 \frac{1}{17} - 4 \frac{5}{17} - 2 \frac{6}{17} - 5 \frac{16}{17} = 12 \frac{8}{17} [/tex]
