Cześć!
a)
[tex]7\frac{3}{5}+1\frac{4}{9}=7\frac{3\cdot9}{5\cdot9}+1\frac{4\cdot5}{9\cdot5}=7\frac{27}{45}+1\frac{20}{45}=8\frac{47}{45}=8+\frac{47}{45}=8+1\frac{2}{45}=9\frac{2}{45}\\[/tex]
b)
[tex]3\frac{3}{10}+7\frac{5}{6}=3\frac{3\cdot3}{10\cdot3}+7\frac{5\cdot5}{6\cdot5}=3\frac{9}{30}+7\frac{25}{30}=10\frac{34}{30}=10\frac{17}{15}=10+\frac{17}{15}=10+1\frac{2}{15}=11\frac{2}{15}\\[/tex]
c)
[tex]9\frac{1}{2}+5\frac{3}{5}=9\frac{1\cdot5}{2\cdot5}+5\frac{3\cdot2}{5\cdot2}=9\frac{5}{10}+5\frac{6}{10}=14\frac{11}{10}=14+\frac{11}{10}=14+1\frac{1}{10}=15\frac{1}{10}\\[/tex]
