1.
a)
[tex]4 \frac{8}{7} - 1 = 3 \frac{8}{7} [/tex]
b)
[tex]5 - \frac{5}{9} = 4 \frac{4}{9} [/tex]
c)
[tex]8 \frac{5}{14} - \frac{9}{14} = 7 \frac{19}{14} - \frac{9}{14} = 7 \frac{10}{14} [/tex]
d)
[tex]6 \frac{4}{21} - 2 \frac{20}{21} = 5 \frac{25}{21} - 2 \frac{20}{21} = 3 \frac{5}{21} [/tex]
2.
a)
[tex] \frac{1}{7} + \frac{3}{7} = \frac{4}{7} [/tex]
b)
[tex]2\frac{3}{15} + 4 \frac{5}{15} = 6 \frac{8}{15} [/tex]
c)
[tex] \frac{9}{13} - \frac{4}{13} = \frac{5}{13} [/tex]
d)
[tex]5 \frac{8}{9} - 3 \frac{1}{9} = 2 \frac{7}{9} [/tex]
3.
a)
[tex]1 \frac{5}{7} + \frac{4}{7} = 1 \frac{9}{7} = 2 \frac{2}{7} [/tex]
b)
[tex]1 \frac{2}{5} +1 \frac{1}{3} = 1 \frac{6}{15} + 1 \frac{5}{15} = 2 \frac{11}{15} [/tex]
c)
[tex]1 \frac{2}{13} - \frac{7}{13} = \frac{15}{13} - \frac{7}{13} = \frac{8}{13} [/tex]
d)
[tex]7 \frac{4}{9} -2 \frac{1}{3} = 7 \frac{4}{9} - 2 \frac{3}{9} = 5 \frac{1}{9} [/tex]
Myślę że pomogłem ;)
