Răspuns:
Explicație pas cu pas:
[tex]a). \frac{35}{15}+\frac{55}{18}-\frac{25}{6} = \frac{7}{3} +\frac{55}{18}-\frac{25}{6} = \\\\= \frac{42}{18} +\frac{55}{18}-\frac{75}{18} = \frac{22}{18} = \frac{11}{9}[/tex]
[tex]b). \frac{10}{16}+\frac{21}{15}-\frac{1}{10}-\frac{3}{20}= \frac{5}{8}+\frac{7}{5}-\frac{1}{10}-\frac{3}{20}= \frac{25+56-4-6}{40} =\frac{71}{40}[/tex]
[tex]c). \frac{4}{9} +\frac{7}{3}-\frac{1}{6} -\frac{7}{30}=\frac{40+210-15-21}{90} =\frac{214}{90} =\frac{107}{45}[/tex]
