[tex]8 \frac{2}{3} + 6 \frac{5}{8} = 8 \frac{16}{24} + 6 \frac{15}{24} = 14 \frac{31}{24} = 15 \frac{7}{24} [/tex]
[tex]5 \frac{7}{9} + 7 \frac{5}{6} = 5 \frac{14}{18} + 7 \frac{15}{18} = 12 \frac{29}{18} = 13 \frac{11}{18} [/tex]
[tex]4 \frac{1}{4} - 2 \frac{3}{4} = 3 \frac{5}{4} - 2 \frac{3}{4} = 1 \frac{2}{4} = 1 \frac{1}{2} [/tex]
Myślę że pomogłem ;)
