Răspuns:
[tex]a)1 \frac{8}{9} + 3 \frac{4}{15} = \\ \frac{17}{9} + \frac{49}{15} = \\ \frac{45}{45} + \frac{147}{45} = \frac{192}{45} \\ \\[/tex]
[tex] c)\frac{12}{35} \times ( - \frac{5}{6} ) = - \frac{2}{5} [/tex]
[tex]b) - \frac{7}{16} + \frac{5}{24} = \\ - \frac{21}{48} + \frac{10}{48} = - \frac{11}{48} [/tex]
[tex]d) \frac{11}{12} \div 1 \frac{7}{15} = \\ \frac{11}{12} \div \frac{22}{15} = \\ \frac{11}{12} \times \frac{15}{22} = \frac{5}{8} [/tex]
