a)
[tex] \frac{6}{5} - \frac{7}{15} + \frac{2}{3} = \frac{18}{15} - \frac{7}{15} + \frac{10}{15} = \frac{11}{15} + \frac{10}{15} = \frac{21}{15} = 1 \frac{6}{15} = 1 \frac{2}{5} [/tex]
b)
[tex]1 \frac{1}{4} - \frac{2}{3} + 2 \frac{5}{6} = 1 \frac{3}{12} - \frac{8}{12} + 2 \frac{10}{12} = \frac{15}{12} - \frac{8}{12} + 2 \frac{10}{12} = \frac{7}{12} + 2 \frac{10}{12} = 2 \frac{17}{12} = 3 \frac{5}{12} [/tex]
c)
[tex]7 \frac{10}{35} + 5 \frac{4}{7} - 3 \frac{2}{5} = 7 \frac{10}{35} + 5 \frac{20}{35} - 3 \frac{14}{35} = 12 \frac{30}{35} - 3 \frac{14}{35} = 9 \frac{16}{35} [/tex]
d)
[tex]1 \frac{13}{25} + \frac{17}{25} - 1 \frac{4}{5} = 1 \frac{30}{25} - 1 \frac{20}{25} = \frac{10}{25} = \frac{2}{5} [/tex]
Myślę że pomogłem ;)
